Storing a calc value which references a Global?

[RDecker]

FM won't allow storage of a calculation if the calc formula includes reference to a global. How can I restructure this scenario:

Calculating a payroll deduction, I use several global fields to specify things like a fixed amount for an optional retirement plan. When I then try to calculate the withholding amount on a paycheck I pull this value from the global field in the Settings file. But this must be a *stored* figure else previous checks will change if the withholding amount is changed during the year (if, e.g., the employee elects to have a different amount withheld).

Any suggestions?

[RDecker]

I should have added that presently I'm pulling the global field into a calc field in the paycheck record (amtRetire = Settings::amtRetire_G).

[transpower]

Look into using the Evaluate function.

[comment]

Change amtRetire into a number field, with auto-entered calculation.

Select "Do not replace existing value for field (if any)" to prevent overwriting data already present.

[RDecker]

Thanks! That's the solution I needed.