System results in Processing Error exception when the version of the message being sent does not match with the HL7 Adapter configuration. This error also results when the document being processed is an empty document caused by errors in the previous processing steps.

ERROR {com.ibi.preemit.HL7PreEmitter} processing error
        getMessage(): Version of the document null does not match configuration 2.5
int getError(): Client
getAdapterCode(): null
getVendorThrowable(): null
        at com.ibi.hl7.HL7OutAdapter.process(HL7OutAdapter.java:165)
        at com.ibi.edaqm.XDAdaptersPreEmitter.transform(XDAdaptersPreEmitter.java:296)
        at com.ibi.edaqm.XDEmit.runListOfPreEmitters(XDEmit.java:682)
        at com.ibi.edaqm.XDEmit.preEmit(XDEmit.java:369)
        at com.ibi.edaqm.XDEmit.preEmit(XDEmit.java:247)
        at com.ibi.edaqm.XDFileEmit.emit(XDFileEmit.java:106)
        at com.ibi.edaqm.XDWorker.sendToAll(XDWorker.java:2761)
        at com.ibi.edaqm.XDWorker.sendToAll(XDWorker.java:2855)
        at com.ibi.edaqm.XDWorker.sendToAll(XDWorker.java:2565)
        at com.ibi.edaqm.XDWorker.invokeAgent(XDWorker.java:1256)
        at com.ibi.edaqm.XDIWAFWorker.run(XDIWAFWorker.java:105)
        at java.lang.Thread.run(Unknown Source)

ERROR Exception when running pre-emitters: XD[FAIL] cause: 0 subcause: 0 message
: Version of the document null does not match configuration 2.5
        XD[FAIL] cause: 0 subcause: 0 message: Version of the document null does not match configuration 2.5
        at com.ibi.edaqm.XDAdaptersPreEmitter.transform(XDAdaptersPreEmitter.java:299)
        at com.ibi.edaqm.XDEmit.runListOfPreEmitters(XDEmit.java:682)
        at com.ibi.edaqm.XDEmit.preEmit(XDEmit.java:369)
        at com.ibi.edaqm.XDEmit.preEmit(XDEmit.java:247)
        at com.ibi.edaqm.XDFileEmit.emit(XDFileEmit.java:106)
        at com.ibi.edaqm.XDWorker.sendToAll(XDWorker.java:2761)
        at com.ibi.edaqm.XDWorker.sendToAll(XDWorker.java:2855)
        at com.ibi.edaqm.XDWorker.sendToAll(XDWorker.java:2565)
        at com.ibi.edaqm.XDWorker.invokeAgent(XDWorker.java:1256)
        at com.ibi.edaqm.XDIWAFWorker.run(XDIWAFWorker.java:105)
        at java.lang.Thread.run(Unknown Source)

You can check the version of the message being sent and the configuration of the HL7 Adapter. Also, check for any other errors reported from the previous processing steps.