Invalid use of the Spacing Limit reference for operations in patterns can lead to unexpected results if specific rules are not followed.

In order to be effective or evaluated a Spacing Limit operation must follow an Even Space operation that uses the same Tool Id and Id Type. Id Type is used on SGF controllers for shape programming.

This change adds a test for Spacing Limit operations. If they don't directly follow an Even Space operation that uses the same Tool Id and Id Type an error message will be generated and the line halted.

The Error message states "Invalid Spacing Limit operation in Pattern %3w. Spacing Limit operations must directly follow an Even Space operation programmed with the same Tool Id and Id Type, if present."