Troubleshooting

Installation

Trouble running “make .exe”

If the code does not compile, check the following:

• Make sure your environment variable CLAW is set properly:

  $ printenv CLAW

  to print the value. The Makefiles use this variable to find the common Makefile and library routines.

• Make sure your environment variable FC is set properly. This should be set to the command used to invoke the Fortran compiler. In many Makefiles this is set to gfortran by default if the user has not set it, via a line of the form:

  FC ?= gfortran

  but this is ignored if the variable has been set by the user. If you get an error like:

  make[1]: gfortran: No such file or directory

  then the gfortran compiler is not being found.

Trouble running “make .data”

If you get the Python error:

ImportError: No module named pyclaw

it’s possible that your environment variable PYTHONPATH does not include $CLAW/python in the path. If you followed the instructions at Setting environment variables then this variable should be set properly. Recall that this has to be set in any new shell you use for Clawpack.

If there are errors in the setrun function (usually defined in setrun.py) then the these may show up when you try to “make .data” since this function must be executed.

Trouble running “make .output”

If you want to re-run the code and you get:

$ make .output
make: `.output' is up to date.

then you can force it to run again by removing the file .output:

$ rm -f .output
$ make .output

This happens for example if you changed something that you know will affect the output but that isn’t in the Makefile’s set of dependencies.

Starting in 4.5.1, you can also do

$ make output

(with no dot before output) to run the code without checking dependencies. See Clawpack Makefiles for more details and warnings.

Trouble running “make .plots”

The Python plotting routines require NumPy and matplotlib. See Python Hints for information on installing this.

If there are errors in the setplot function (usually defined in setplot.py) then the these may show up when you try to “make .output” since this function must be executed.

Starting in 4.5.1, you can also do

$ make plots

(with no dot before plots) to plot the output without checking dependencies. See Clawpack Makefiles for more details and warnings.