Hi Mirek,
mssql is defined as MSSQLSession: this application basically retrieves data from a sqlite db and put them into a MS SQL db, so I have two different sql sessions and I do not use the global SQL session.

The SqlSession:: before the ThrowOnError was a typo and I removed it.

I tried to put the DDUMP but I get a really weird error from the compiler: "error C2018: unknown character '0x40'". This error pops up on the lines "DDUMP(b);" and "DDUMP(session.throwonerror);", if I remove those lines the application compiles. I opened the .cpp file with an hex editor and did not find any 0x40 char. Also I updated the compiler to VS2017 (previously I used 2015), bu the error still appears.

Regards,
gio