You can disabled this option from the TestStand Sequence Editor by completing the following steps.
1. From within TestStand Sequence Editor, select
Debug»Sequence Analyzer»Sequence Analyzer Options.
2. When prompted with the following dialog box,
disable the option Analyze File Before Executing and select OK to confirm.
Disable this option can be useful to avoid initial errors for example, if you are creating variables during the execution of your sequence file.
Additional Information
TestStand Sequence Editor - TestStand Help