modification steel lisp program for indian standards - ipn to issc

[coolkris]

Dear all,

I am trying to modify the oldest steel lisp utility(64kb-all together-.dat,.lsp,.dcl,.sld) through dialoq box using dcl, lisp and data files to convert it into indian standards. It is freeware as mentioned in readme.txt.

I have done most of it, it works well. Only IPN to ISCC, I replaced the data file.

In the attached ipn-india.dat file upto *180 it works fine. From *200 it draws the root radius wrong. except that everything is fine.

I have attached all the files and wrong root radius sketch also. I kindly request you to modify the lisp file for me.  The thikness of the flange is less than toe radius where in problem arises. 

Thanks

Krish

[Sea-Haven]

 A bit of serious code to wade through, a casual observation is to rename your dat file say to stl_ind then you need to add the IND to the correct parts of the code. Then it may be possible to follow the sequence at moment there is two IPN dat files. It may be reading parts of both.

[coolkris]

Thanks for the reply. I have done everything as you said. other things like
equal angles , unequal angles, parallel flange channel etc working fine as
per changed data.

I have added 2 files(ipn.dat and ipn-india.dat) only for reference for
someone to go through, I will rename one file(ipn.dat) at a time and ran
through. Only ipn.dat as referred in stl.lsp file. I want to knwo exactly
why only when flange thick ness is less than root radius the error happens.

[Sea-Haven]

Its a big bit of code so need to work out 1st which defun is causing problem, Load it into VLIDE and run then choose "last Break source " when it stops this will show where the error is.

[coolkris]

thanks again for the interest, I have done what you said. there is no error.
its a long code though, I want to repair or understand only the small part
of IPN only.
sincerely there is no error the output is coming as per input as per
attached sketch.
The function pline defining points of IPN in autocad lisp stl.lsp.