Technical Solutions

Why does the second run of my xPC Target simulation return wrong tg.outputlog values?

Date Last Modified: Friday, June 26, 2009

Solution ID:		1-18DTB
Product:		xPC Target
Reported in Release:		R12
Platform:		All Platforms
Operating System:		All OS

 

Subject:

Why does the second run of my xPC Target simulation return wrong tg.outputlog values?

Problem Description:

Why does the second run of my xPC Target simulation return wrong tg.outputlog values?

All models return wrong values the second time a model is built or simulated in real time. Here are my host computer specifications on which xPC Target version 1.1.3 (R12.1) runs:

- Operating System is Windows 2000
- Dell laptop with a Pentium 3
- PCMCIA ethernet card.

The target computer specifcations are as follows:

- VersaLogic SBC6
- 256 MB of RAM

This setup worked fine with xPC Target version 1.0 and Matlab 5.3.1 (R11.1).

The error happens on multiple targets and multiple hosts. Therefore, I do not think the target is the issue since rebooting it has no effect. Only the MATLAB command CLEAR ALL seems to work. If I the run the simulation again after executing a CLEAR ALL it works fine. But again, the second time the mode is run, tg.outputlog has all wrong values. Below is what "xpctest" shows:

>> clear all
>> xpctest

### xPC Target Test Suite 1.1
### Host-Target interface is: TCP/IP (Ethernet)
### Test 1, Ping target system using standard ping: ... OK
### Test 2, Ping target system using xpctargetping: ... OK
### Test 3, Reboot target using direct call: .... OK
### Test 4, Build and download xPC Target application using model xpcosc: ... OK
### Test 5, Check host-target communication for commands: ... OK
### Test 6, Download xPC Target application using OOP: ... OK
### Test 7, Execute xPC Target application for 0.2s: ... OK
### Test 8, Upload logged data and compare it with simulation: ... OK
### Test Suite successfully finished

>> xpctest

### xPC Target Test Suite 1.1
### Host-Target interface is: TCP/IP (Ethernet)
### Test 1, Ping target system using standard ping: ... OK
...
...
### Test 8, Upload logged data and compare it with simulation: ... FAILED

Test #8 always fails on the second run. Is there a better solution to this problem other than using the MATLAB command CLEAR ALL?

Solution: The problem seems to be with the following dll's that communicate between the target and host on Windows 95, 98, and ME: xpcstrtok1.dll xpcstrtok2.dll xpcstrtok3.dll Please download these dll's from our web site http://www.mathworks.com/support/solutions/files/s27889 and overwrite the existing dll's which are located in: $MATLAB\toolbox\rtw\targets\xpc\xpc\private (where $MATLAB is the root directory where you have installed MATLAB)

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