DSnewptr address changes after calling dll function cause labview to crash when disposing pointer

[Rediis]

Hello, I try to deference 5 float arrays generated and passed from dll.

  

I use DSnewptr to allocate 5 memory blocks, and each block is set as size of (float) * array length;

All 5 dst arrays can successfully dereference the float values, however, this vi will crash when some of the DSDisposePtr are being called.

I guess it crashes due to the addresses from DSnewptr are somehow modified by my dll function, and wrong address are passed for disposing.

This vi will not crash if I set the "block size"(array length) less equal than 13, and the addresses generated by DSnewptr will not changed by CLFN.

Please help! Thank you.

[Rediis]

vi attached

[cordm · Accepted solution]

The readXindata call library node for the array arguments must be changed to pass by value

[cordm]

The same goes for the src parameter to MoveBlock. The value you have is already a pointer. You are effectively overwriting the pointer address. You can see that in the pictures: the input and output of the sx terminals should stay the same.

[Rediis]

Thank you!! It works now!!!!