Webmethods EDI (convert XML to EDI)

When I invoke wm.b2b.edi:convertToString service, it does not return any string object instead it returns errorArray saying "
Unrecognized object found for node - ST [EDICOR.000020.000050]”.

Please help me out in this.

What input’s are you mapping in the convertToString?? Make sure you have the Values (IDATA object-- ST level data),ffSchema (fully qualified path of the EDIFFSchema) etc.

Which EDI document type you are trying to create edidata string for?