365 Sharepoint Workflow

[clareq]

I have a 365 Sharepoint 2013 workflow, which uses a Set variable to extract an e-mail address from a form, and then send to that e-mail address. Later on in the same workflow an e-mail is sent to the person who created the form. In both cases this works intermittently, but in some cases the e-mails aren't received - are there any logs I can look at. There are no error messages generated as far as I can see.

[clareq]

Anyone?