[OS X TeX] Multido--"illegal unit of measure" in pstricks

[Nitecki, Zbigniew H.]

In the attached I have created a wiggly (more-or-less vertical) line and am trying to create several copies of it, displaced at regular horizontal intervals.
I use a real counter \rT added to fixed coordinates.  The error message says “illegal unit of measure—pt added”.  I don’t understand: coordinates are entered into pscurve as real numbers.  What am I missing?


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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