Circular Reference

[Czeszyn]

I have created a form that takes data that has been entered and put the calculation into the proper field.

I have one that says:
Total All Scrap : [HiddenTA]-[GP12]

For some reason, I am getting a "The expression cannot be saved because it contains a circular reference." Not sure why I am getting this.

 

[pbaldy]

Are there calculations behind those? Can you attach the db here?

 

[isladogs]

This suggests the value of HiddenTA is based on GP12 directly or indirectly (or vice versa).
So the calculation is a loop or circular reference