Yes I see the same thing Now. I had to bill several clients yesterday for a misc change and no other items were billed on these orders hence my problem with the error msg. Now when I test it with keying in an item you're correct the error msg is now gone and I can go into misc. charges and now edit them.

I also tried again without an item and now works to edit misc charges. I'm not sure what will happen however if I completely exit and come back try again. I assume the error will be back.

Since you have been able to duplicate this error hopefully it's something that can be fix at your end for future releases.

I'm not sure what you need to know by setup but we use OE and IC and pretty sure it's pretty standard set up, keying in items
or selecting from misc charges drop down field.
Thanks for your help
Treasure