Free Support Forum -

GroupDocs pdf comparison not working


Dear Atir,

We have found the same issue in another pdf file set too. In this case the Source is base version and Target is the updated data of Source. I will share the problematic file for you reference.Problematic_Source.pdf (2.7 MB)
Problematic_Target.pdf (2.1 MB)

Please provide the fix at the earliest. It is urgent for us



This issue will be resolved in upcoming release (19.1) of the API. We’ll notify you as we have any further update.
We’ll appreciate your patience in this regard.


Dear Atir,

Could you please update the release date of the next API (19.1). We need the fix at the earliest.



GroupDocs.Comparison for .NET 19.1 will be released in few days. We shall notify you as release gets on-board.



Your reported issue COMPARISONNET-1747 is now fixed. Please download latest release of the API.


Dear Atir,

There exists the issue with pdf comparison. The new version fixed the previous problematic files comparison issue. But now on comparing another set the same null reference issue happens. Here i am attaching the problematic filesSource_31012019.pdf (1.1 MB)
Target_31012019.pdf (482.4 KB)
Is that the comparison tool wont compare documents with different content?



Sorry for the inconvenience you are facing.
We are further investigating this issue. Your investigation ticket ID is COMPARISONNET-1803. We shall notify you as we have any further update.


Hi Atir,

Any update on the Comparison issue?



Your reported issue will be resolved in next release of the API 19.2. As release gets on-board we’ll notify you.