friends in lotus notes every time after maintanance were are getting the application problem i.e application which we are using is not running properly after some instance i found the solution that is deleting the index xxx.ft and creating the index after that if we start application it working fine.i need to know reason why it happening
1.weather they r not quit the domino properly?
2.closing the application before it finish its operation?
3.any other reason?
can any one help me on this issue

Software/Hardware used:
Software