The P21 Validation Engines are consistently updated and improved upon with insights from our Subject Matter Experts, consultations with regulatory agencies, and findings submitted by our users. Examples include:

• AD1012 has been split into two rules: AD1012 and AD1012A. The former checks for custom variables and is a Warning; the later checks for standard variables and is an Error. These rules consider secondary variable names ending in *N or *C, for numeric or character equivalent, respectively.

• AD0047 was producing problems for some variables but has already been fixed and patched for over a year.