mlab crash on startup "werl.exe has encountered a problem...."

[ConfusedCam]

Hi all,

A little background. I use Wings3d to generate parts for the electronic PCB layout software KiCAD. I struggle at best with Wings3d, but I have a fair bit of experience using parametric/solid modelling CAD type programs.

One thing I struggle at is drilling holes, so easy in CAD, confuses the hell out of me in Wings3D. Anyway long story short I found mlab, and love the CSG operations, they help me a lot.

But latest builds of mlab crash on launch. Giving the helpful error "werl.exe has encountered a problem and needs to close."

Error signature
AppName: werl.exe AppVer: 0.0.0.0 ModName: beam.smp.dll ModVer: 0.0.0.0 Offset: 0004bb10

I tied it down to the exact version the crashes started at:

wings-1.4.1.2012-01-28---19-33.mlab.exe This is the last version that works for me.
wings-1.4.1.2012-03-18---17-51.mlab.exe This version crashes and so does every version after.

Comparing the two installs the difference that sticks out is, the working one uses beam.dll, the none working one uses beam.smp.dll

I also tried wings-1.5.pre1.74.g2aee.exe out of interest, it runs fine.

I have tried turning "Hardware acceleration" down on my graphics card as suggested in a couple of places on the net, it made no difference.

OS is Windows XP SP3, it's an oldish machine, graphics card is an AGP Sapphire ATI Radeon HD 4650.

Also tried on another XP sp3 box, and latest mlab build (wings-1.5.0.2013-03-24---09-42.mlab.exe) failed with a different error: "failed to start wings3d error:14001"

Tried the same build on a win7 box and it worked.

I am totally lost as what to try next, any suggestions ?

Thanks.
Cam.