"William W. Plummer" wrote in message news:ctncc.82738
I was not using the GPS for altitude. Always use the altimeter
The altimeter was showing 7000.
ATC was showing 6700
Gps was 7060. However when I changed altitude the gps stayed frozen at
7060.

Aren't controllers supposed to tell you to turn off your altimeter and go to
VFR when an error that big is detected?

They can tell you to stop altitude squawk if they want. They have no business to
tell you to "go VFR"