Error message displayed is not proper if the valid Center/Group is not selected for generation of collection sheet

1. Create a loan product, Create a Center and attache Group to it, Attache weekly meeting from 01 June 2016 on friday.
2. Create a client under above group and attache JLG loan on 01 June 2016 with synk repayment with meeting.
3. Approve and disburse the loan
4. Click on the collection sheet and enter meeting calendar as 10 June 2016 and click on generate collection sheet,
error message displayed as "Collection sheet cannot be generated for center/group without attach meeting define" though the meting date is valid.