5/5/2026 8:43:11 AM - 
Message:	Length cannot be less than zero.
Parameter name: length
StackTrace:	   at System.String.Substring(Int32 startIndex, Int32 length)
   at Surveya_Service.Surveya_Service.UploadResponseDocument(String documentID, String responseID, String surveyID, String fileExtension, String documentName, String documentBlob) in C:\Projects\Surveya\surveya_service_and_webapp\Surveya Service\Surveya_Service.svc.cs:line 3289


5/5/2026 8:43:42 AM - 
Message:	Length cannot be less than zero.
Parameter name: length
StackTrace:	   at System.String.Substring(Int32 startIndex, Int32 length)
   at Surveya_Service.Surveya_Service.UploadResponseDocument(String documentID, String responseID, String surveyID, String fileExtension, String documentName, String documentBlob) in C:\Projects\Surveya\surveya_service_and_webapp\Surveya Service\Surveya_Service.svc.cs:line 3289


5/5/2026 8:49:08 AM - 
Message:	Length cannot be less than zero.
Parameter name: length
StackTrace:	   at System.String.Substring(Int32 startIndex, Int32 length)
   at Surveya_Service.Surveya_Service.UploadResponseDocument(String documentID, String responseID, String surveyID, String fileExtension, String documentName, String documentBlob) in C:\Projects\Surveya\surveya_service_and_webapp\Surveya Service\Surveya_Service.svc.cs:line 3289


5/5/2026 3:57:23 PM - 
Message:	Object reference not set to an instance of an object.
StackTrace:	   at Surveya_Service.Surveya_Service.DownloadSurveys(String secretKey, String surveyIDs, String preview) in C:\Projects\Surveya\surveya_service_and_webapp\Surveya Service\Surveya_Service.svc.cs:line 33284