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Cannot connect to trfcserv.exe

We have to interface to a third party export system for outbound invoices. We moved RFC SDK to that system and keep trfcserv.exe running in register mode on SAP gateway. It works fine, the file is transfered to that system perfectly. But when we change it to 'START' mode i.e run trfcserv.exe on demand, it does not work. Instead, we are getting this error 'no connect of TP:"directory/filename". It works fine in register mode but not in start mode of RFC. Could you please help out?

We have to interface to a third party export system for outbound invoices. We moved RFC SDK to that system and keep trfcserv.exe running in register mode on SAP gateway. It works fine, the file is transfered to that system perfectly. But when we change it to 'START' mode i.e run trfcserv.exe on demand, it does not work. Instead, we are getting this error 'no connect of TP:"directory/filename". It works fine in register mode but not in start mode of RFC. Could you please help out?
Generally, this is a problem in your network architecture, not one of SAP itself. So you should analyze this from your OS directly.

It looks that the SAP box has a problem to contact the satellite system. This can be due to authorization problems or that the trfcserv.exe is not in the call path (Windows PATH setting in Control Panel -> System -> Environment). I suggest that you first try to call trfcserv.exe from a command line of your SAP application server, that you use to connect from.

If you run register mode, you use the backward path. In that case it is trfcserv that connects to R/3, which apparently works fine.
This was last published in May 2003

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