Using a PCI-7344 motion card, I send a Stop-Halt command to my drive so the motor will hold position. This works for a certain amount of time (variable - usually a few hours) and then the motor suddenly starts spinning at high velocity and I get this error message: "Error -70005 occurred at Stop Motion (8 axes).flx." The way the code is written, the stop command is sent every 100ms or so while it is stopped. Any idea what could be causing this? Thanks for your help.