Known issues and FAQ's

Platform issues

If you are behind a proxy server, chances are that you are unable to download the Python and/or Perl dependencies. The solution is to
open a cmd.exe and set the below variable:

set HTTP_PROXY=http://your_proxy_ip:port

and then start the McStas installer from within that cmd.exe shell

When having Safari as browser and using mcdoc from the command line e.g.
```
mcdoc Source
```
the generated links can not be followed. See https://github.com/McStasMcXtrace/McCode/issues/670 for a workaround
On Mojave (10.14) and High Sierra (10.13) some users have reported compilation errors mentioning
```
math.h not found
```
See https://github.com/McStasMcXtrace/McCode/issues/676 how to resolve this
If you are unable to run
```
mcrun.pl --test
```
on your mac, chances are you did not install our Perl dependencies. Please use the script https://github.com/McStasMcXtrace/McCode/blob/master/support/MacOSX/Check-dependencies/Check-PL-dependencies.command (also came with your downloaded package)
To make a newly installed McStas on macOS the Unix system default, please either
Use the 'File' -> 'Set as default' from mcgui
Start a mcstas-2.5-environment shell and issue the command

postinst set_mccode_default

(If failures are reported you may need to sudo that command)

On Debian 9 and newer, including Ubuntu 18.04 LTS the default setup of the PGPLOT plotter uses the Giza libraries which e.g. does not produce png file successfully with mcdisplay.pl and mcplot.pl. See https://github.com/McStasMcXtrace/McCode/issues/558 for workarounds

Unfortunately, the mcstas-suite-*-2.5 packages did not include the mcstas-ncrystal-2.5 package and hence needs to be installed independently. This unfortunately has the side effect that some symlinks are broken. Hence also please reinstall e.g. mcstas-tools-python-mcrun-2.5.