receiving the following alarm... Alarm user has pressed emer

[wayne]

This is the error I'm getting...


"Alarm

User has pressed emergency key, system locking

Information

The emergency signal may cause the stepper motor lose step, recommend return to z."

I didn't hit the emergency button. 

This error is coming up randomly during a project. Sometimes at the start. 

Any ideas?

Thanks

[gerry]

What machine?