NI-DMM driver(2.7.2) error code -1074118131(0XBFFA420D) The generated LC coefficients are invalid. after final step in PXI-4072 external adjustment.This happens until system is rebooted and external cal is run again.

[dh5869]

From NI Spy during external calibration of PXI-4072 using CVI version, compile 8.1, CVI runtime 9.00.

Everthing upto this point is VI_SUCCESS

Then line 6 turns "red"

5.  niDMM_CalAdjustLC (PXI1Slot11, 4)
Process ID: 0x000009D4         Thread ID: 0x00000744
Start Time: 12:43:49.328       Call Duration 00:01:26.593
Status: 0 (VI_SUCCESS)

> 6.  niDMM_CalAdjustLC (PXI1Slot11, 5)
> Process ID: 0x000009D4         Thread ID: 0x00000744
> Start Time: 12:45:59.875       Call Duration 00:00:33.375
> Status: 0xBFFA420D

7.  niDMM_GetError (PXI1Slot11, NULL, 0, NULL)
Process ID: 0x000009D4         Thread ID: 0x00000744
Start Time: 12:46:33.250       Call Duration 00:00:00.000
Status: 0x00000064

8.  niDMM_GetError (PXI1Slot11, -1074118131, 100, "The generated L...justment order.")
Process ID: 0x000009D4         Thread ID: 0x00000744
Start Time: 12:46:33.250       Call Duration 00:00:00.000
Status: 0 (VI_SUCCESS)

[HeatherBaker]

Hi dh5869,

Is this behavior only with this board?  Has it been successfully externally calibrated before?  Were there issues with the board to drive the calibration or is this routine?  What is the part number on your card?  Typically this is 6 numbers followed by a letter and -01.  This will allow me to look for any known issues with that board revision. 

[dh5869]

Hello h-Baker,

We have this problem ith all PXI-4072 DMM's during external calibration. We cannot get past this step till we reboot the machine and just run the adjustment procedure stand alone. We have taken the 4072 cal procedure pdf instructions and created a Labwindows CVI program. Following all of the CVI instructions to the letter. The program executes the 2 year performance tests. Then the adjustments, followed by the 24 hour performance test. Unless we start with a just booted machine we get the posted error when we get to the last adjustment steps. We have NI-Spyed the entire program. We get no errors until that last adjustment step which refuse to go through and generates the -1074118131 error. We are at a loss as to what to try next. Like I said if we reboot the PXI chassis and controller and just run the adjustments it will work. Any help with the errors would be appreciated.

[dh5869]

Is this behavior only with this board? 

 It happens with rev,B,C,or D 4072 DMM's.

Has it been successfully externally calibrated before?

We can get them to complete external adjustment, after reboot of pxi-8196 in 1045 chassis.

Were there issues with the board to drive the calibration or is this routine? 

It is routine to adjust these units on a yearly basis.

What is the part number on your card? 

The sticker reads 191485B-03 and 191485C-03 on the other. They both throw the same error.

[HeatherBaker]

Hi dh5869,

Try upgrading to the latest version of NI-DMM as there is a documented fix in the readme for NI-DMM 2.8 that addresses LC behavior.  Please let me know if you continue to experience this behavior after upgrading.