There are a few steps you can take to proactively prevent errors in your conditional mail merge.
To prevent potential errors, verify the following before running a conditional mail merge:
1. Confirm the titles of all the documents that will be used in the mail merge are 8 characters or less. 2. Remove any punctuation marks and/or spaces from the titles of the documents that will be used. 3. Make sure all files and documents having to do with the conditional mail merge are in the same file folder.