Essential Studio® for Document Processing - v33.2.4 Release Notes

v33.2.4
April 28, 2026
Test Results: 234828 Success , 0 Failure

PDF Library

.NET PDF Library

Bug Fixes

  • I830670 - Fixed an issue where Thai text was not preserved correctly when drawing strings in PDF documents.
  • I823084 - Fixed an issue where a CheckBox field was not checked correctly when the field was set to read-only.
  • I829893 - Resolved the issue where the signature was not preserved after flattening the PDF document.

JavaScript PDF Library

Bug Fixes

  • #I833449 - Fixed an issue where an invalid or unexpected token exception occurred while adding accented characters.
  • #I830311 - Fixed an issue where ordered form fields did not return the correct tab order for a specific document.
  • #I830200 - Fixed an issue that caused PDF corruption during annotation export and import in JSON format.
  • #I829125 - Fixed an issue where the stamp appearance was not preserved when importing annotations.
  • #I827855 - Fixed an issue where the document became corrupted during redaction for a specific file.
  • #I824988 - Resolved an issue where text content in a PDF grid cell was truncated when the cell contained large amounts of data.

Word Library

.NET Word Library

Bug Fixes

  • I823028 - Font are now preserved properly when resaving a DOCX document.
  • I825692 - Table is now indented properly after appending HTML content using AppendHTML API.
  • I829402 - Shapes are now preserved properly while converting a Word document to PDF.
  • I828867 - Table cell width is now preserved properly while converting a RTF document to DOCX.
  • I827816 - Autofit table column width are now preserved properly while converting a Word document to PDF.
  • I826257 - The StackOverflowException will no longer be thrown due to table with keep with next tag while converting Word to PDF.
  • I826938 - Text with multiple continuous section break is now preserved properly while converting Word to PDF.
  • I818073 - Numbered text with decimal characters is now preserved properly in different culture variants while converting Word to PDF.
  • I825370 - Hanging issue will no longer occurs due to multi column with footnote while converting Word to PDF.
  • I829327 - Nested table split to next page is now properly preserved during Word to PDF conversion.

Excel Library

.NET Excel Library

Bug Fixes

  • #I814263 - Fixed an exception that occurred when the stream position was not updated correctly while parsing undefined records in sheet data.
  • #I814804 - Resolved a performance degradation during Excel-to-PDF conversion caused by inflated worksheet ranges and excessive conditional formatting.
  • #I824263 - Fixed an exception thrown when setting formulas longer than 255 characters due to single-byte length storage limitations.
  • #I829705 - Resolved a System.ArgumentException that occurred when setting the Shape.Top property after adding a picture.
  • #I824690 - Updated GetValueRowCol to return decimal values with precision consistent with Microsoft Excel behavior.
  • #I828854 - Fixed an issue where formulas containing Excel function SINGLE returned SINGLE instead of the expected implicit intersection operator (@).
  • #I827543 - Fixed an issue where images were not preserved correctly when resaving Excel files containing both embedded and externally linked images.
  • Improved FillSeries to correctly handle negative step values with positive stop values for Days, Months, Weekdays, Years, and Linear series, enabling backward-fill patterns (for example: FillSeries(…, ExcelFillSeries.Months, -1, 10)).

PDF Viewer

Web PDF Viewer (Javascript, Angular, React, Vue, ASP.NET Core & MVC)

Bug Fixes

  • #I824790 - Resolved an issue where the showToolbarItem method did not work for custom toolbar items.
  • #I829535 - Fixed an issue where the area annotation label was not displayed after exporting and importing a document in the PDF Viewer.
  • #I830721 - Fixed an issue where the findText method did not work properly with a customer provided document.
  • #I830154 - Fixed an exception that occurred while downloading a document containing a straight line ink annotation.
  • #I831256 - Fixed an issue where form field names with underscores were not set properly when the Form Designer module was disabled.
  • #I830801 - Fixed an issue where the ink annotation was not completed properly when selecting a text markup tool while ink mode was active.

.NET MAUI PDF Viewer

Bug Fixes

  • #I832341 - Font resources now load correctly without throwing an invalid font URI exception when opening PDFs that reference embedded assets such as Roboto.ttf in the MAUI PDF Viewer.

DOCX Editor

Web DOCX Editor (Javascript, Angular, React, Vue, ASP.NET Core & MVC)

Bug Fixes

#F73578 - Fixed an issue where the footnote separator line always rendered left-aligned in RTL documents.
#I829025 - Resolved an issue where ribbon styles were not applied when the style icon was collapsed.
#I826799 - Fixed an issue where the document language changed from English (UK) to the local locale (English - Nigeria) after download.
#I829897 - Fixed misalignment of the text cursor caused by the Page Number button in the Header & Footer tab.
#I824705 - Resolved corrupted rendering when enableSelection was used in React DocumentEditor read-only mode.
#I830170 - Fixed an issue where text moved out of the content control on pressing Enter and could not be deleted or edited.
#I829697 - Fixed truncation of labels in the Format Picture tab when using the Italian locale in ribbon mode.
#I821272 - Fixed table layout misalignment after copying and pasting content within cells and reopening the document.
#I821118 - Resolved an issue where the Document Editor became unresponsive when opening a file.
#I800755 - Fixed an issue where page numbers were not preserved during PDF conversion.
#I817069 - Fixed text overlapping with the paragraph mark when deleting a line break.
#I829081 - Fixed an issue where the table background gradient option had no effect on table appearance.
#I827240 - Resolved an exception that occurred when serializing Group content controls on the server side.
#I819564 - Fixed an issue where spell-check replacements were not reflected in the document text.

Blazor DOCX Editor

Bug Fixes

#F73578 - Fixed an issue where the footnote separator line always rendered left-aligned in RTL documents.
#I826799 - Fixed an issue where the document language changed from English (UK) to the local locale (English - Nigeria) after download.
#I824705 - Resolved corrupted rendering when enableSelection was used in React DocumentEditor read-only mode.
#I830170 - Fixed an issue where text moved out of the content control on pressing Enter and could not be deleted or edited.
#I821272 - Fixed table layout misalignment after copying and pasting content within cells and reopening the document.
#I821118 - Resolved an issue where the Document Editor became unresponsive when opening a file.
#I800755 - Fixed an issue where page numbers were not preserved during PDF conversion.
#I817069 - Fixed text overlapping with the paragraph mark when deleting a line break.
#I829081 - Fixed an issue where the table background gradient option had no effect on table appearance.
#I827240 - Resolved an exception that occurred when serializing Group content controls on the server side.
#I819564 - Fixed an issue where spell-check replacements were not reflected in the document text.

Test Results

Component Name Platform Test Cases Passed Failed Remarks
Calculate Library .NET 145 145 0 All Passed
DOCX Editor Blazor 1985 1985 0 All Passed
DOCX Editor Web(Javascript, Angular, React, Vue, ASP.NET Core & MVC) 5230 5230 0 All Passed
Excel Library .NET 37993 37993 0 All Passed
Metafile Renderer .NET 897 897 0 All Passed
PDF Library .NET 14060 14060 0 All Passed
PDF Viewer .NET MAUI 15368 15368 0 All Passed
PDF Viewer Blazor 16532 16532 0 All Passed
PDF Viewer Web(Javascript, Angular, React, Vue, ASP.NET Core & MVC) 21897 21897 0 All Passed
PDF Viewer Windows Forms 209 209 0 All Passed
PDF Viewer WPF 3040 3040 0 All Passed
PowerPoint Library .NET 54547 54547 0 All Passed
Spreadsheet Blazor 4167 4167 0 All Passed
Spreadsheet Web(Javascript, Angular, React, Vue, ASP.NET Core & MVC) 10882 10882 0 All Passed
Spreadsheet WPF 2716 2716 0 All Passed
Word Library .NET 41081 41081 0 All Passed
Word Library Java 4079 4079 0 All Passed