My solution to MATLAB script error 1047 and error 1050

[Kevin Parkin]

MATLAB: Version R2007b

Labview: Version 8.5 and Version 8.2.1

OS: Windows Vista SP1

Symptoms:  VI's containing a MATLAB script node either did not load, took a very long time to load, or produced error 1047 or 1050.

Explanation:  Matlab had an error in running as an automation (COM) object and would not load.  This is testable by going to the bin directory of matlab (in my case C:\Program Files\MATLAB\R2007b\bin) in a command prompt and typing "matlab -automation".  In my case MATLAB did not appear, but typing "matlab -automation -nojvm" did enable MATLAB to appear.  Logic dictates this was a JAVA virtual machine problem, looking in the C:\Users\<my user name>\AppData\Local\Temp directory reveals the JAVA log files with a name of the form java.log.<some number>.  In my case, the contents looked like this:

Error occurred during initialization of VM
Could not reserve enough space for object heap
Stack Trace:
  [0] jmi.dll:void __stdcall mwJavaAbort(void)(0x78f95578 "Could not reserve enough space f..", 0, 0x78dd0000, 0x03fe3130 "øNúx") + 21 bytes

------------------------------------------------------------------------
        Fatal Java Exception detected at Thu Apr 17 20:17:48 2008
------------------------------------------------------------------------

Configuration:
  MATLAB Version:   7.5.0.342 (R2007b)
  Operating System: Microsoft Windows Vista
  Window System:    Version 6.0 (Build 6001: Service Pack 1)
  Processor ID:     x86 Family 6 Model 15 Stepping 6, GenuineIntel
  Virtual Machine:  Java is not enabled
  Default Charset:  windows-1252

Java is not enabled

Solution:  Following this procedure (http://www.campus.uniroma1.it/Licenze/Installazioni/MatLab75/fac/398525.htm) and in particular setting the environment variable "MATLAB_RESERVE_LO=0" fixed the problem.  Now when I type "matlab -automation", a matlab window pops up, and Labview is able to run matlab script nodes once more.

I spent a day of my life on this and for the sake of humanity wanted to share the solution - hope it helps!

Message Edited by Kevin Parkin on 04-17-2008 10:54 PM

[muks]

Thanx for sharing the info.I suppose i didnt explore it that well.

[muks]

Hey and congratulations on becoming a proven member with a single post. Wow coming into the forum with a B-A-N-G!!!!!!!!!!!

[Kolos]

I have the same problem (error 1047), but i can't load the link, you had written (http://www.campus.uniroma1.it/Licenze/Installazioni/MatLab75/fac/398525.htm)

So pls help!

Kolos 

[Kolos]

Oh, i found the solution: http://digital.ni.com/public.nsf/allkb/4475BC3CEB062C9586256D750058F14B

Just download a new dll file...