Not able to do End Of Day and showing error message 'Till Session not available'

Not able to do End Of Day and showing error message 'Till Session not available'

Environment : 

iVend 6.5 Update 5 with SAPB1

Problem Statement : 

Customer has informed that unable to do EOD while selecting the assigned till showing error message ‘Till Session is not available’.

Symptoms : 

Some tills were in assigned status and not closed and because of error message was showing there.

Resolution/Work Around :  

We need to close the assigned tills then only we can do the End Of day process. If getting such error message while removing/closing tills on iVend MC Till screen , need to analyze the issue while checking iVend tables and support assistance should be taken on the same. 

Recommendations /Suggestion : 

Assigned tills should be closed then only EOD can perform.