Error- "Too few initial conditions" equations

[remslie]

The differential equation solve block is giving an error regarding too few initial conditions. I have 3 second order equations and 6 initial conditions. I cannot understand why there is an error??

Any assistance would be appreciated

Thanks Ross

[Fred_Kohlhepp]

Mathcad's error messages have always been challenging to understand.  An error message in a solve block that can't be traced should usually be interpreted as, "I'm not sure what is the problem but I can't find a solution."

I never found a way to actually parse out what the issue is short of trial and error.

[remslie]

Fred, It amazes me how complex the code must be behind the what you see. The logic needed to investigate issues and give a meaningful error diagnosis must be just as complicated and I guess they dedicate less time to this than we would like. Thanks for your insights.

Cheers

Ross

[AndyWesterman]

check the definition of xb, it has a multiply between the name & the bracket

seems to be the only error - after this was corrected the sheet appears to run.

Regards

Andy

[remslie]

Andy,

I knew it had to be something simple. Such a powerful program but so often you get tripped up by simple syntax.The Community saves the day..........again!

Many thanks. Ross