Why is the hourly sync failing with Variable does not exist: tmpVar1?

From version 7.155, the hourly sync reads a new Status field on the Subscriber List object. If the user who runs sendItScheduleSubscriptions cannot see that field, Salesforce reports it as Variable does not exist: tmpVar1 and the job fails. In the app this is logged as CM4SF_LIST_STATUS_ACCESS.

The packaged permission set sendIT Full Access includes this field automatically on upgrade. Assign that permission set to the user shown as Submitted By on the scheduled job (Setup > Scheduled Jobs > sendItScheduleSubscriptions).

If you use a custom or cloned permission set instead, add Read and Edit on the Status field (API name Status__c) on the Subscriber List object, then save. New packaged fields are not added to custom permission sets on upgrade, so this needs doing each time we ship a new field.

The next hourly run should complete normally. To run sooner, open Campaign Monitor Admin > Sync Settings and click Sync Now.