Fatal Internal Error: "memory.cpp", line 593

[ajmib]

Hello Chris,
This is what i did: in the true case, i placed a waveform chart with an increment and a shift register inside a while loop (initial condition = 1). In the false case i placed the imaq functions to acquire and store an image.
When i passed a true, the dll worked correctly, but when i passed a false, it showed me same error (Fatal Internal Error: "memory.cpp", line 593, LabVIEW 7.0).

[Chris_Cilino]

ajmib,

There's an article that I want to point you to before I assume that there may be a problem with the imaq calls. See http://digital.ni.com/public.nsf/websearch/DA7FA9C467BA4CC886256E62006DEBA2?OpenDocument. This document talks about allocating memory correctly when passing arrays to\from dlls. Also check out http://zone.ni.com/devzone/conceptd.nsf/webmain/5cf9a9ffd774028586256869005ff2ed, specifically the section on Advanced Topic Array and String operations.

One last question. Does the vi from which you make the dll run correctly?

Chris C

Applications Engineering

National Instruments

[ajmib]

Chris,
the VIs from which i'm creating the DLLs work correctly. I don't know if the problem if due to allocating memory when passing arrays to\from dll, because i created another VI that loaded and showed an image only and matlab gave me same error message.

Jose B.

[MarcoPolo5]

Jose,

Are you trying to pass the LabVIEW Image Datatype? If so, this is unlike other LabVIEW datatypes - you could think of it like a pointer. The IMAQ Create sets up an area in your system memory to store the image data - the Image Datatype that is passed to the other IMAQ Vi's is like a pointer to that buffer - it does not actually transfer the image data. If you need to pass the image data - use the IMAQ Image to Array.vi to extract the image into an array of integer values that you can pass.

I am still very unclear exactly what is going on. Perhaps this link will have some sources for you to debug your dll problems:

http://zone.ni.com/devzone/devzone.nsf/webcategories/E2A99E7E10D5725D862567AC004F0A53 

[Radadia]

Hi MIT users, I have a very simple question for you. The mex files that I create with the help of MIT are supposed to get a filename, and capture an image using the camera and save it to disk with the given filename. There is not return/output back to matlab from this mex file. I heavily use IMAQ vi in the creation of the mex file, the question is DO I NEED TO INCLUDE THE IMAQ VIs AS DYNAMIC VIs WHEN CREATING THE MEX CODE? Many thanks, Adarsh

[RavensFan]

You should post your message in a new thread rather than hijacking a 5 year old thread.  While your question also deals with IMAQ, that is the only thing your question has in common with the thread you posted into.