# [OS X TeX] multido(?) error

Nitecki, Zbigniew H. Zbigniew.Nitecki at tufts.edu
Thu Apr 30 23:57:47 EDT 2020

I’m trying to draw some phase portraits of 2nd order systems of o.d.e. using the pst-ode package.  I modelled my code after a more elaborate example
on stack exchange.
In the attached code, I get a “forgotten end group” error at line 48 (which reads \end{pspicture}), and if I persist (using r on the console) it tells me the
\begin{pspicture} on line 38 is ended by \end{document} on line 49.  I know my use of ODEsolve is correct, since with parameters entered directly
it works.

Could this have to do with my putting the output of ODEsolve in the file line_ii_ij (inside the top multido)?  I didn’t fully understand the first two
arguments in ODEsolve: the first is the output and the second apparently sets the mode of output (in the documentation the examples just give a name
to the output and use (0 1) for the mode of output).

Zbigniew Nitecki
Department of Mathematics
Tufts University
Medford, MA 02155

telephones:
Office    (617)627-3843
Dept.    (617)627-3234
Dept. fax    (617)627-3966
http://www.tufts.edu/~znitecki/

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