Error 200088

[stevesteve]

I have compiled a Labview dll (Labview 2013) with standard Daqmx functions in it and am calling the dll from Freemat (Matlab). This dll works well writing & reading from a USB-6501 via the Freemat/Matlab program. However when certain Freemat/Matlab sub routines are called (that don't have Daqmx in them) and then returned to the main Freemat/Matlab program the next read/write I get the Error -200088 'task specified or does not exist'. 

NI Daqmx 14.0

Max 14.0

Labview runtime 2013 sp1

Windows 7

What non Daqmx event would cause the Daqmx function to do this?

Attached is the Ni i/o trace.

[IngramW]

Hi Steve,

Have you tried calling your dll from LabVIEW? In that way we can isolate whether there is a problem with your dll or with MatLAB.

Thanks

Ingram

[stevesteve]

I have isolated the problem further.

It would seem that the Matlab code has some code in it that opens & closes ethernet IP sockets (ports). When this occurrs it somehow interupts the Daqmx or Max (server?), which results in the error message 200088 occuring on the next call to a dio via Daqmx.

also see:

http://forums.ni.com/t5/LabVIEW/error-2147220719/m-p/3098450/highlight/true#M886841

Not sure what can be done about this, not sure what the Max (server) does.