Snapshot error encountered(156)

Hi, i have this common problem but don´t encountered solution. Please, help.

This is a VMWare virtual machine, and the space disk is Ok.

06/03/2015 04:17:30 a.m. - Critical bpbrm(pid=13220) from client servgdmon3.servcorp.com.ar: cannot open C:\Program Files\Veritas\NetBackup\online_util\fi_cntl\bpfis.fim.servgdmon3.servcorp.com.ar_1425626061.1.0      
06/03/2015 04:17:30 a.m. - Info bpfis(pid=6904) done. status: 1542          
06/03/2015 04:17:30 a.m. - end VMware, Delete Snapshot; elapsed time: 00:00:09
06/03/2015 04:17:30 a.m. - Info bpfis(pid=0) done. status: 1542: An existing snapshot is no longer valid and cannot be mounted for subsequent operations
06/03/2015 04:17:30 a.m. - end writing
Status 1542
06/03/2015 04:17:30 a.m. - end operation
Status 156
06/03/2015 04:17:30 a.m. - end operation
snapshot error encountered(156)