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https://issues.apache.org/jira/browse/OFBIZ-6639?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15341155#comment-15341155 ]
Rohit Koushal commented on OFBIZ-6639:
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The error is due to the browser problem. Some browser like Chrome and Chromium fire 2 request for PDF download in which one request contain the desired parameter and another request does not contain any parameter. Hence in some PDF document some parameters are mandatory due to which BIRT engine throw exception.
Here are some refrence link about it.
[Do most browsers make multiple HTTP Requests when displaying a PDF from within the browser|
http://stackoverflow.com/questions/1817750/do-most-browsers-make-multiple-http-requests-when-displaying-a-pdf-from-within-t]
[Chrome sends two requests when downloading a PDF|
http://stackoverflow.com/questions/32725608/chrome-sends-two-requests-when-downloading-a-pdf-and-cancels-one-of-them]
[Why does chrome do 2 requests for a pdf file|
http://stackoverflow.com/questions/33419721/why-does-chrome-do-2-requests-for-a-pdf-file]
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