DSNA204E DSNACA00 TCB=address CANNOT USE 'DISCONNECT', THERE WAS NO 'CONNECT' IN EFFECT

Explanation
 A DISCONNECT request was received but no Db2 connection had been established.
This is a user error. The message is accompanied by return code (R15)
200 and code (R0) 00C10204.

System action
 No DISCONNECT has been performed. The Db2 call attachment facility is
ready for more input.

System programmer response
 Refer the problem to the programmer
using the Db2 call attachment
facility.

Programmer response
 Correct the logic in your application.
Do not issue DISCONNECT unless a CONNECT has been performed.

Problem determination
 See a DSNTRACE trace stream to understand
the context of this message.