Typically, the Inconsistent IDLE state message comes up if you have any data or CTL action points on the IDLE state boundary that differ across waveforms. What needs to be consistent is actually the "level" of the data trace or CTL lines in the IDLE state. Usually, the used part of the waveform will be bracketed by two IDLE state bands. If you change the state of a data or CTL action point that resides on one boundary of the IDLE state, the tool will the change the "level" of the data trace or CTL line on the other boundary to keep them consistent.
Unfortunately, in v18.104.22.168 there are some rare instances where you get stuck and can't export to a gpif.c file.
This problem is fixed in v22.214.171.124 and later. Please download the latest version from our website.