.net 3.0 ||| CPIC return code 020, SAP return code 223

Hi,

we try to use .net connector 3.0 with our custom .net application, all works fine but after we open connection and we close out application (as a normal windows application) we see several error/warning into SM21 transaction of SAP istance:

Operating system call recv failed (error no. 131 )

Connection to CPI-C client 268 was closed

> Partner LU name:

> Host: 98.89.12.31

> Partner TP Name: AINTDP

Operating system call recv failed (error no. 131 )

Connection to CPI-C client 045 was closed

> Partner LU name:

> Host: 98.89.12.31

> Partner TP Name: AINTDP

Communication error, CPIC return code 020, SAP return code 223

Communication error, CPIC return code 020, SAP return code 223

> Conversation ID: 53493345

> Conversation ID: 53494495

> CPI-C function: CMSEND(SAP)

> CPI-C function: CMSEND(SAP)

Have you got any suggest?

Regards.