Docstrader valvegear simulation

I'm trying to refine a Walshaerts valvegear driving a slide valve for my latest loco. It looks good but the simulator will not allow me to come out of mid-gear. No matter what, it throws up a flag every time saying, 'Invalid floating point operation' Has anyone any ideas, please, I'm getting frustrated!

 

Granville Askham

Hi Granville,

 

can't give you a definitive answer but I had this myself some time ago. I can't remember if it was with the Dockstader software or one of Bill Hall's versions. It's actually a windows error message, not the valve gear software. I did a search on the net for 'Invalid floating point operation' which came up with loads of results and suggested cures.  I eventually found something that did cure the problem but I can't remember what it was

Hopefully someone with a bit more computer knowledge might be able to point you in the right direction.

 

John

Thanks John,

 

You pointed me in the right direction, it sounds like a job for my grandson!

 

Gran