During our BizTalk migration, we have encountered below error in the BizTalk administration console
Reason: Unable to cast object of type ‘Microsoft.BizTalk.Streaming.VirtualStream’ to type ‘System.IO.MemoryStream’.
We thought it would be certificate error and we are checking partner certificate and our certificate.
But when we checked the event viewer, we are seeing the below error and interestingly we are not seeing this Error in our old server when the partner is sending the same file again and again
So we compared the EDI settings of same party in Old server with new server and we identified the issue
Duplicate check functionality is enabled in new server and it was disabled in old server for interchange settings
New Server Interchange Settings
Old Server Interchange Settings
So disabled the settings and issue got fixed.
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