The attached files and script demonstrates the problem. I am able to produce the figure when the variables all reside in the same file. When the variables come from separate files, the script crashes w/ an error below.
I installed 7.1 this morning on OSX 10.11.6 but the error remains (I had the same issue on 7.0).
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/Users/Toby/pyferret7.1.0/lib/python2.7/site-packages/pyferret/__init__.py", line 535, in init
result = run()
File "/Users/Toby/pyferret7.1.0/lib/python2.7/site-packages/pyferret/__init__.py", line 707, in run
retval = libpyferret._run(str_command)
RuntimeError:
**ERROR Ferret crash; signal = 11 (SIGSEGV)
Enter Ctrl-D to exit Python