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Hello, I write here a topic, because I'm looking for a help since I can not deal with some issue for a long time. I'm trying to write LabView program which will program uC flash using JTAG usbWiggler manufactured by Macraigor Systems. The manufacturer provides customers with program to do whole staff connected with programming, but it's stand alone app and I would like to build the programming process into the test sequence performed by LabView (program + test). Additionally the manufacturer provides a library to call various functions related to programming, erasing etc. I tried to write a program to use dll but no success. There is some small cmd exe program which is using the dll (also created by the supplier), and its working, but there are some bugs in it, and I cannot change it or make some error handling so that's why I decided to use dll alone. I attached dll, dll readme file, ocd file (configuration file for uC), and VIs. I checked the first command called: "FlashSetupAndConnect" it's working without hardware, so you are able to test something. (checked with cmd exe program, without device it always pass if input data is ok, it fails when something is missing like bad path file etc.) Status from each function should be "1", and I get "0" all the time. The function should looks like this (copied from readme file): int FlashProgrammer_SetupAndConnect(char *ocd_filename, char *device_name, char *device_address, unsigned long baud_rate, unsigned long jtag_speed); I will be very grateful for any answer and advices. Dawid K. readme.rtf OCDandDLLl.zip