Hi Ludek,
Thanks for your information and all valued information.
My crystal report is version 2013 and VS2010. I also installed CR for VS 13_0_15.
I designed the report in crystal report 2013 and add existed item in VS2010.
Now the issue is that crystal report within VS2010 cannot extract any data from Oracle database in main report preview and get following error message :
From my point of view, this issue is not related to program , something is wrong of environment.
The translated attached message is showing:
Fail to execute the query. OCI call fail: OCIStmtexecute Oracle error code: 904
Any help or suggestion is highly appreciated.