When attempting to load an image file within ENVI Classic we see the following error. "Attempt to call undefined procedure: 'CAT_IMAGE_MOVE_EVENT'"
ENVI Classic 5.7, CAT for ENVI version 7.4 (Classic)
Steps to reproduce
Launch ENVI Classic
Select File - Open Image File
Select an image file, for testing purposes I've been using C:\Program Files\Harris\ENVI57\classic\data\bhtmref.img
Click Load Band
The warning message appears, once you click OK ENVI Classic closes