https://issues.apache.org/bugzilla/show_bug.cgi?id=45901
Summary: Error Opening Excel .xls file in mhtml format <Rel. POI
3.1>
Product: POI
Version: 3.1
Platform: PC
OS/Version: Windows XP
Status: NEW
Severity: critical
Priority: P2
Component: POIFS
AssignedTo: [email protected]
ReportedBy: [EMAIL PROTECTED]
Hello,
I am generating the Cognos Reports through Java using Cognos API. While
generating the reports we set the outputformat to XLWA (Microsoft Excel Web
Archive (XLWA) format). The reports generated files have .xls extension.
When I try to read this file it gives me the following error:
------------------------------------------------------------------
java.io.IOException: Invalid header signature; read 8243089445407770957,
expected -2226271756974174256
at
org.apache.poi.poifs.storage.HeaderBlockReader.<init>(HeaderBlockReader.java:112)
at
org.apache.poi.poifs.filesystem.POIFSFileSystem.<init>(POIFSFileSystem.java:151)
-------------------------------------------------------------------
If I open and save one of the report files in XLS format. The POI is able to
read it correctly. Looks like it is unable to recognize the format. But since
these reports are generated in batch mode and in huge number it is practically
not possible to open and save all these reports in XLS format. Also, if I try
to use SaveAs of MS-Excel, it show the SaveAs file Type to be mthml.
I will appreciate if you could give me some pointers on this.
Thanks in advance!
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