OWN MISTAKE: ""Subject" could not be converted to a string" for some e-mails in a repeat group

[0800-grizzly]

UPDATE: found out this was due to a formula error, which left the deadline date field in #ERROR for the affected records. SORRY not to have noticed it before posting.

rgds,

Björn

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Hi,

Sending out personalised e-mails with repeating group automation. Out of a bunch of 96, some 5 just failed with a quite unhelpful ""Subject" could not be converted to a string" message.

The e-mail subject field uses a variable to fetch a deadline date. For 95% of the e-mails it works like when tested, for 5% it doesn't.

Any ideas how to troubleshoot? How on earth does it work for some, but not for others? It's the same data that is retrieved for all.

Rgds,

Björn

[Alexey_Gusev]

Hi,
look into history, expand list of values, check which are failed