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I have imported “GroupDocs.Viewer-for-Java-Front-End” from github.

When I run the project got error in “/GetDocumentPageImage” as given below :–>

DEBUG org.springframework.web.servlet.DispatcherServlet - Could not complete request
com.groupdocs.viewer.exception.GroupDocsViewerException: mod/GroupDocsOutputStream -> seek
at com.groupdocs.viewer.converter.a.bEE(Unknown Source)
at com.groupdocs.viewer.handler.ViewerHandler.a(Unknown Source)
at com.groupdocs.viewer.handler.ViewerHandler.a(Unknown Source)
at com.groupdocs.viewer.handler.ViewerImageHandler.a(Unknown Source)
at com.groupdocs.viewer.handler.ViewerImageHandler.getPages(Unknown Source)
at com.viewer.controller.ViewerController1.GetDocumentPageImage(
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(
at sun.reflect.DelegatingMethodAccessorImpl.invoke(
at java.lang.reflect.Method.invoke(

Thanks in advance

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Thank you for the inquiry. We successfully reproduced this issue at our end. We have logged it on GitHub. Please follow this link in order keep track of the updates.
However, we’d highly recommend you to use/evaluate our Modern UI showcase project. It is the most recent and updated showcase project that perfectly demonstrates all core features of the API. For your ease, we do have showcase documentation.
GroupDocs.Viewer for Java - Modern UI - Wiki
Please go through the wiki, evaluate Modern UI project and share your experience.


In addition to the previous reply, it’s been observed that if you try image based rendering for any image file you’ll get the exception and that is a back-end API issue. Hence, we’ve logged it in our internal issue tracking system with ID:VIEWERJAVA-1513. As we get any update from the concerned team, we’ll apprise you. Your patience will be appreciated.


Thanks a lot.

@shaileshdg05 ,

You’re welcome.


The issue you found earlier (filed as VIEWERJAVA-1513) has been fixed in this update.