Error 1073807346 Serial Modbus

[andreab93]

Hi everybody,

I'm trying to acquire data from an Infineon XMC 4500 microcontroller with serial Modbus protocol (9600 8 N 1); I also use a USB-RS232 converter.

When I read registers I get a 1073807346 Error ("The given session or object reference is invalid"). In particular the error appears in Read Holding Registers and Read Input Registers functions.

I checked all possible solutions from NI suopport document relative to this kind of error.

Does anybody ever dealt with this problem? 

I also include a VI snippet from selection.

Thanks any advance for any advice.

Andrea.

[Dennis_Knutson · Accepted solution]

One or more of your events is not passing the resource name through to the shift register. You have selected Use Default if Unwired. The default is an empty resource name.