[OS X TeX] stupiid question

[Nitecki, Zbigniew H.]

I’m trying to run a test to see why the pst-nodes package is not letting me do certain things inside a big book project.
I set up a minimal test file which (I think) calls all the relevant packages called by my much bigger book file.
 The commands inside this file (as is, before introducing the eventual changes which lead to problems in my book file) work fine in the context of my book project,
but in this stand-alone form I get the error message  (when typesetting as latex)

./NodeTest.tex:19: Undefined control sequence.
\c at lor@to at ps ->\PSTricks
                         _Not_Configured_For_This_Format
l.19 \pspolygon(
                 0,0)(4,0)(4,4)(0,4)

I thought \pspolygon was a basic command in PSTricks.  What have I forgotten to load?

I’m sure my forehead will feel a loud smack! when I find out.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://email.esm.psu.edu/pipermail/macosx-tex/attachments/20220528/b6fd5e39/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: NodeTest.tex
Type: application/octet-stream
Size: 675 bytes
Desc: NodeTest.tex
URL: <https://email.esm.psu.edu/pipermail/macosx-tex/attachments/20220528/b6fd5e39/attachment.obj>