two (2) message mappings for one (1) interface mapping possible?

Hello everyone!

Right now? I've assigned two mapping programs (1 XSLT, and 1 XI message mapping) to an Interface Mapping in the integration repository.

However, I'm getting a parser error: <i><b>"XMLParser: No data allowed here: (hex) 0(:main:, row:5, col:0"</b></i> when I test the message.

Can anyone tell me how to successfully configure two message mappings for one Interface mapping? And what the cause of the above error might be?

Thanks in advance!

Glenn