report fields no showing when linking

Printed From: Crystal Reports Book — Forum Name: Technical Questions

Hello
I have a report with 3 subreports which work fine.
My issue is, I added a 4th subreport and when trying to link to the main report, there aren't any fildes to link to.
I have solved my problem.
The field types didn't match.
On the main report it the field was a datetime and on the subreport it wasa char.