Hello Mike,
Is your IS environment implemented any largefile handling configurations in the Extended Settings page such as large doc threshold etc…??
Also can you check the IS heap memory settings allocated resources configuration values from the IS Admin console?
One other thing is try to implement xmlnodeIterator services in your flow this way the large XML payloads can be processed with in the IS performance settings and can avoid such type of hung’s.
Please check and try to implement the above solutions.
HTH,
RMG
#edi#webMethods#Integration-Server-and-ESB