Technical FAQs

Question

My document has Asian characters (CJK, etc.), which are not displaying correctly in PrizmDoc Viewer; what steps can I take to view them?

Answer

In some cases, the reason is due to the fonts not being installed on the operating system. We have outlined some commands to install fonts for select operating systems below:

In CentOS 6 do:

yum groupinstall "Chinese Support"
yum groupinstall "Japanese Support"
yum groupinstall "Korean Support"
yum groupinstall "Kannada Support"
yum groupinstall "Hindi Support"

In CentOS 7 do:

yum groupinstall "fonts"

In Ubuntu do:

sudo apt-get install language-pack-ja
sudo apt-get install japan*
sudo apt-get install language-pack-zh*
sudo apt-get install chinese*
sudo apt-get install language-pack-ko
sudo apt-get install korean*
sudo apt-get install fonts-arphic-ukai fonts-arphic-uming fonts-ipafont-mincho fonts-ipafont-gothic fonts-unfonts-core
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Question

When using the PrizmDoc samples, the sample documents included are taking close to 1 minute to load in the viewer. The same also happens when uploading files into the sample.

The server processes are showing minimal impact on CPU and memory. However, the hard drive was spiking to 100% utilization sporadically.

Answer

We have found that Windows Defender with enabled Real-Time scanning can significantly impact performance. Once Real-Time scanning was disabled, we found this issue to be immediately resolved.

To disable Windows Defender, you can do the following:

  1. Right-click on the Windows Logo in the lower left-hand corner and select Control Panel.
  2. Select Windows Defender and then select Settings.
  3. Under the Real-Time protection section, slide the switch to Off.
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Question

With PrizmDoc, how can I hide a predefined search if there are no results?

Answer

The predefined search option does not support that functionality, but you can instead perform a server-side search, and then activate the search panel if there are results to show:

var viewer;
var viewingSessionId = <%= viewingSessionId %>;

var fixedSearchTerm = "the";
var pasUrl = "/pas";

var viewerReady = false;
var searchReady = false;
var searchDisplayed = false;

function displaySearchIfNeeded() {
    // The search is only displayed once the viewer is ready, and once our preliminary server-side search comes back positive.
    if (viewerReady && searchReady && !searchDisplayed) {
        searchDisplayed = true;

        $("[data-pcc-search=\"input\"]").val(fixedSearchTerm);
        $("[data-pcc-search=\"submit\"]").click();
    }
}

function sendSearchPost() {
    $.ajax({
        "method": "POST",
        "url": pasUrl + "/v2/viewingSessions/" + viewingSessionId + "/searchTasks",
        "data": JSON.stringify({
            "input": {
                "searchTerms": [
                    {
                        "type": "simple",
                        "pattern": fixedSearchTerm,
                        "caseSensitive": false,
                        "termId": "0"
                    }
                ]
            }
        }),
        "contentType": "application/json",
        "success": function(response) {
            $.ajax({
                "url": pasUrl + "/v2/searchTasks/" + response["processId"] + "/results?limit=1",
                "success": function(response) {
                    if (response.results.length !== 0) {
                        searchReady = true;

                        displaySearchIfNeeded();
                    }
                },
            });
        },
        "error": function(jqXHR, textStatus, errorThrown) {
            if (jqXHR.status === 480) {
                setTimeout(sendSearchPost, 2000);
            }
        }
    });
};

setTimeout(sendSearchPost, 500);

$(document).ready(function() {
    // Since we are no longer restricted to a predefined search, we can load the viewer ASAP.
    viewer = $("#viewer").pccViewer({
        "documentID": viewingSessionId,
        "imageHandlerUrl": "/pas",
        "language": viewerCustomizations.languages["en-US"],
        "template": viewerCustomizations.template,
        "icons": viewerCustomizations.icons
    });

    viewer.viewerControl.on("ViewerReady", function(event) {
        viewerReady = true;

        displaySearchIfNeeded();
    });
});
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Question

In PrizmDoc Viewer, when viewing Excel documents that have pictures on certain spreadsheets within that document, the pictures are not displayed.

This appears to happen only if PrizmDoc has the Microsoft Office Conversion (MSO) feature enabled. This issue does not occur if PrizmDoc is using LibreOffice.

Why is this happening?

Answer

The issue is related to an Excel “Page Setup” option called “Black and white”. The option is located in Excel under File, Print, Page Setup and is only respected when PrizmDoc has the MSO feature enabled.

When using LibreOffice, this setting does not exist and is ignored, which is why you can see the pictures.

By default, this option is disabled in Excel, so that specific option would have to be manually set by the creator of the document.

As a workaround, ensure that the “Page Setup” option for “Black and white” is not checked on any spreadsheets in an Excel document that has pictures.

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Question

When viewing .csv files in PrizmDoc Viewer, the dates in the CSV file are in UK format (DD/MM/YYYY). However, if the DD is lower than 13 it is converted to US date format (MM/DD/YYYY).

Answer

Workaround:

The suggested workaround is to use Excel files instead of CSV to avoid this situation. Excel file format stores date/time format in the file.

Issue:

This is a bug in the MS Excel COM Interop that is being used by the product (MsOfficeConverter). Here is the related Excel bug: https://social.msdn.microsoft.com/Forums/vstudio/en-US/82248560-dabd-4c90-b1e2-793b2f32b257/excel-bug-handling-dates-in-csv-files-using-microsoftofficeinteropexcel?forum=exceldev

Problem description:

When using MS Excel Interop to open CSV files, all date/times there are being interpreted with “en-US” locale, regardless of actual system locale. Here is the description from the bug link above:

Excel interpreting dates when its reads csv files via .NET Interop. It is not a excel formatting issue per say. When excel accesses information such as dates (which are stored as numbers in memory to support arithmetic operations) from text files, it has to convert the date from textual representation (within the csv file, such as 2012-09-12) to the equivalent number in Excel memory (e.g. 41164 which represents 2012-09-12). When we use Interop to access this number in memory, many are interpreted incorrectly – swapping days with months and vice versa. This is a bug, as Excel is not abiding by the system culture on interpreting local date formats.

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Question

After searching a document, an error icon appears in the search results panel. Clicking on it displays the following error message: “x page(s) cannot be searched.” Why does this occur and how can I find out which specific pages couldn’t be searched?

Answer

When the PrizmDoc Viewer text-service cannot find any text for a given page in the document, it provides an array of all the pages without text in the response from searchTask results.

In short, the document is fine and simply contains pages without text. If you look at the pagesWithoutText array contained within the response data from searchTasks, you’ll see something like this:

[0, 1, 7, 17, 43, 45, 65, 67, 77, 79,…]

The values reported are pages that do not contain any text but instead are either blank or contain an image. This data can then be used to inform the user of how many pages are not searchable.

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top coding trends

The software development industry is changing more rapidly than ever before. With new technology hitting the market on a regular basis, software vendors need to become flexible enough to adapt to the top coding trends if they want to remain competitive.

After a tumultuous 2020, the industry has seen a number of key trends emerge in the first half of 2021. Here are some of the top coding trends worth watching in the second half of the year.

Top 5 Coding Trends of 2021 (So Far)

1. Open-Source Evolution

Developers have been turning to open-source solutions for some time now as a quick way to integrate new features into their applications. While there are a lot of great benefits to using open-source code, it’s not always the simple solution that it appears to be. Substantial work may need to be done to implement the specific features an application requires. More importantly, open-source solutions rarely offer much in the way of support or security updates, and there can also be complicated intellectual property issues to consider when incorporating open source code into a proprietary application.

That’s why many innovative developers are using stable open-source solutions as a foundation for creating more feature-rich software SDKs. For teams building new applications, it’s often much easier to implement one of these integrations because it will require far less configurations and additional coding to get up and running. They can also get the benefits of dedicated support and not have to worry about whether their new integration will create any legal issues down the road.

2. UX Design

With the proliferation of Software as a Service (SaaS) platforms and the widespread use of open source development resources, it’s becoming easier for organizations to find the applications that suit their business needs. What they can’t always find, however, is a solution that’s easy for their employees and customers to use. That’s why the quality of an application’s user experience (UX) is quickly becoming a key differentiator in the software market.

Rather than implementing UX features at a later stage of the coding process, developers need to consider how users will interact with their solution from the very beginning. Software needs to be intuitive and easy to implement out-of-the-box. This applies equally to end-user products and developer-focused SDK integrations. No one has time to struggle with software that’s difficult to use. If a solution proves too cumbersome and hard to implement, customers will likely turn to a competing product that offers a better user experience. The more time developers spend considering their software’s UX, the better they’ll be able to adapt it to customer needs in the future.

3. Responsive Mobile Support

For many years, there was a somewhat artificial distinction between mobile software development and desktop development. But in a world where half of all internet activity comes from mobile devices, no developer working on web-based applications can afford to consider their software “just” for desktops. Just as website designers have been building pages that respond dynamically to different screen sizes and control interfaces, developers must also account for the unique characteristics of mobile devices.

The unique characteristics of mobile screens present specific challenges regarding the application’s user interface (UI). Simply providing standard desktop controls is bound to result in a frustrating mobile experience. Mobile responsive applications can accommodate touch-specific controls (such as pinch-to-zoom) without compromising the desktop experience at the same time. Developers must think about what kinds of devices their software solutions will be used on if they’re to build features and tools that will truly benefit their customers.

4. API Integrations

Today’s developers no longer need to build every feature their application might require from scratch. Thanks to a new generation of web API technology, it’s easier than ever to find software integrations that can quickly and easily add vital features without having to dedicate weeks of development time to building them. Understanding which web application features can be incorporated via a REST API helps development teams to focus their limited resources and time on the truly unique features that will help set them apart from the competition.

Utilizing web API technologies can streamline sprints and shorten development time significantly. That’s because much of the “trial and error” work of building a new feature is eliminated. Rather than designing and testing new capabilities for months, developers can simply implement a tested and proven web API integration within a matter of days. That helps to keep budgets under control and development schedules on track to make targeted launch days.

5. Remote Work

When the COVID-19 pandemic struck the world in early 2020, many software developers transitioned to a remote workplace arrangement. As other industries begin to tentatively return to the office, tech workers seem to have become quite accustomed to working remotely. According to a late 2020 survey conducted by Indeed, nearly half of participants reported that they now have the option to work remotely on a permanent basis, with 95 percent of them planning to do so. Perhaps even more telling, however, was the finding that 60 percent of tech workers are willing to take a pay cut in order to keep working from home.

Software vendors will have to accommodate these expectations if they hope to remain competitive when it comes to finding and retaining talent. Project managers should not expect work patterns to go back to the way they were before the pandemic. They will be better served focusing on how to organize remote work efficiently and how to provide the resources developers need to be productive while working from home. Transitioning to a more remote workforce is also allowing organizations to tap into a much broader pool of talent, which will help to bring more diverse voices and experiences into the development process.

Keeping an Eye on Future Trends

The software development teams at Accusoft are always looking ahead to see where today’s coding trends are leading the industry. That’s why we’ve been building easy-to-implement, lightweight SDKs like the free-to-use Accusoft PDF Viewer alongside our stable of versatile API solutions like PrizmDoc Viewer. We also continue to make ongoing improvements to our products to provide a better user experience for customers.

Our collection of software integrations can help development teams keep up with today’s top coding trends. Whether you’re looking to quickly integrate new features into an existing application or are looking for the right tools to support your next project, we have the API and SDK resources to keep you on-budget and on-time. Check out the Accusoft Resource Center to learn more.

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TAMPA, Fla. – 2021 marks the 30th anniversary for Accusoft Corporation, the longtime leader in content, processing, conversion, and automation technologies for developers.

Headquartered in Tampa, FL, Accusoft was founded in 1991 as Pegasus Imaging, a provider of technology and solutions to the photo and document imaging markets. In 1998, Pegasus Imaging expanded into medical compression technologies. This technology was adopted by some of the largest medical technology companies in the world, including GE Healthcare, McKesson, Phillips Medical Systems, Siemens Medical Solutions, and Toshiba.

Between 2004-2008 Pegasus Imaging acquired TMSSequoia and Accusoft which moved the company into the forms processing and image cleanup technologies. In 2012, Pegasus Imaging was rebranded to Accusoft Corporation. 

Today, after seeing three decades of change and innovation, Accusoft is proud to bring new technologies to market, driven by the goal of improving the document lifecycle experience for businesses and their employees. 

Most recently Accusoft created and launched OnTask and the Accusoft PDF Viewer. OnTask is a workflow automation tool that makes it easy for small to mid-sized businesses to digitally send and fill forms, get signatures on documents, and automate overall business processes.The Accusoft PDF Viewer is a JavaScript SDK that easily integrates into a developer’s web application to enable PDF viewing and annotation features with no server dependencies.

“Every day I am so amazed by the talent and passion of the team we have built at Accusoft,” said Accusoft CEO Jack Berlin. “30 years in business is a testament to our employees, as well as the innovation and quality of the products we bring to the market.”

For more information about Accusoft, please visit https://www.accusoft.com/.

About Accusoft: 

Founded in 1991, Accusoft is a software development company specializing in content processing, conversion, and automation solutions. From out-of-the-box and configurable applications to APIs built for developers, Accusoft software enables users to solve their most complex workflow challenges and gain insights from content in any format, on any device. Backed by 40 patents, the company’s flagship products, including OnTask, PrizmDoc™ Viewer, and ImageGear, are designed to improve productivity, provide actionable data, and deliver results that matter. The Accusoft team is dedicated to continuous innovation through customer-centric product development, new version release, and a passion for understanding industry trends that drive consumer demand. Visit us at www.accusoft.com.

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Over the last few years, codemantra has focused on developing document processing capabilities to enhance its core document management systems. The multifaceted collectionPoint platform leverages the power of machine learning to extract data and integrate with business applications such as LMS solutions, ERP software, and CRM systems. However, in order to maximize collectionPoint’s document flexibility, codemantra needed the right integrations to manage and edit PDF documents. Rather than devoting additional development resources to building a viewing solution in-house, the codemantra team instead conducted a thorough review of multiple third-party integrations to find the ideal match for collectionPoint. Find out why they chose PrizmDoc® for Java, formerly VirtualViewer®.

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Question

When loading PDF documents into PrizmDoc that contain embedded highlights, rather than appearing translucent, the highlights are appearing opaque and are covering the underlying text. Why is this happening?

Answer

Prior to version 13.4 of PrizmDoc, this was occurring due to limitations in web browsers. The SVG attribute comp-op="multiply" was not widely supported in modern browsers.

With PrizmDoc version 13.4, the way highlights were rendered was changed to resolve this issue.

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Question

I want to re-arrange the page order of a PDF. I’ve tried the following…

var page = imGearDocument.Pages[indx].Clone();

imGearDocument.Pages.RemoveAt(indx); //// Exception: "One or more pages are in use and could not be deleted."

imGearDocument.Pages.Insert(newIndx, page);

But an exception is thrown. Somehow, even though the page was cloned, the exception states that the page can’t be removed because it’s still in use.

What am I doing wrong here?

Answer

If you’re using an older version of ImageGear .NET, you may run into this exception when you clone the page. Some of the resources between the original and the clone are still shared, which is why this happens.

Starting with ImageGear .NET v24.8, this no longer happens, and the above code should work fine.

If you still need to use the earlier version, you can use the InsertPages method instead.

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