I managed to track down the error. It's in the lines to send the Session
File interrogation.groovy lines 158-161
Code:
// Send the face pic, if it exists
def face = loadString("interrogation.session_facepic")
if ((face != null) && (face.size() > 10)) facepic = sendImage(face)
send("interrogation."+identifier+".face",facepic)
If no facepic was interrogated, variable facepic is NULL when sending the identifier
Extending the if did mend the problem
Code:
// Send the face pic, if it exists
def face = loadString("interrogation.session_facepic")
// facepic error fix
if ((face != null) && (face.size() > 10)) {
facepic = sendImage(face)
send("interrogation."+identifier+".face",facepic)
}