Use this method very carefully in managed change and Meridian Advanced Project Workflow operations, batch operations, or if references are involved. It could cause unexpected results. For example, if a project copy is made of a master document that has a reference to another document and the operation is canceled by validation in script, the referenced document might still be copied but without the reference (because the master document was not copied). If the successful project copy is then released as a master revision, the existing reference between the source documents will be deleted (because the project copy had no reference to the master document). In such scenarios, the validation script should produce a different result than aborting the operation, such as setting the target folder to Nothing, which prevents copying the referenced document.