Troubleshooting

| ### Troubleshooting

### Compilation fails while building moc_briconwidget.cxx

This is probably due to a badly installed Qwt plugin. The instructions on how to install the plugin can be found in the supplementary document: Preparing a build environment.

Following my instructions, the plugin should've installed into the plugins/designer directory in your Qt installation directory. If you choose to install it elsewhere then Qt tools: designer; moc; uic, etc., won't be able to find it. To tell Qt tools where to find the plugin use the designer tool's preferences has a place where you can add custom directories to the "Plugin Paths."

A quick test of the plugin is to run Qt's designer application. If the plugin is okay you'll see a Qwt pane in the tools on the left-hand side which will be filled with the Qwt widgets.

### Run-time problems on CentOS

The current redhat binaries can be used on CentOS-4 platforms as long as you have the correct compatability libraries installed. If, at run-time, you get an error message: `.../usr/lib64/libstdc++.so.6: version `GLIBCXX_3.4.4' not found (required by...`, then try `yum install compat-libstdc++-33`.