Workflow using julian year or calculated date function

Hello,

1. I have a workflow that triggers if two date fields are null

2. the actions should be to take a the year from a different field, add +1 year and then updates the field with a new date.

I can get the code to work without adding the extra year e.g. '06' + '/' + '01' + ToChar([{dQualification_Date}],'/YYYY') = 01/06/[{dQualification_Date}].

However trying to increment the year value by 1 seems to cause problems (no error message when checking the syntax in the code edit) no error in the workflow monitor, just no output.

The latest code I've tried: