RFC server in WinService - TARGET_METHOD_EXCEPTION

Hello all,

I use the RFC server by Windwos service. The function is good,

but when I would like to recall after 2-3 hours

the program/connection is dumping in SAP.

Dump

-

Exception condition "TARGET_METHOD_EXCEPTION" raised.

The current ABAP/4 program encountered an unexpected

situation.

SY-MSGTY E SY-MSGID SR

SY-MSGNO 000

SY-MSGV1 Length cannot be less than zero.##Parameter name:

SY-MSGV2 length SY-MSGV3

SY-MSGV4

Somebody can help pme please?

thank you

Thoomasz