Hello Indranil,
As far as i know, Q3 is a standard language that allows two machines to talk. It is especially usefull to make the OMCR communicate with a NMC for instance, or with an external module.
So your error actually means : “error on something i’m not being able to read”
What you could do is check your Q3 interface (Q3 is customizable, maybe someone modified an attribute by mistake)
Good luck,
Pix