Error Code -1074135039 for Multiple active sessions on NI switch Module

[Yuvish]

I am using NI MUX PXI 2525 (2 wire), PXIe controller 8880 with pharlaps

I get the error and I am unable to clear this error programmatically (close/Reset did not work). This goes off after several restart of PXI.

This error occurs very rarely (say one in three months). Can anyone suggests how to clear the error without restart of PXI