Some commands make only sense in a batch file like ``if'' and ``while''. Please have a look into ``If and while demo'' on how to work with this commands. Results can be extracted and stored to a file, see ``How to write values to a file''.
Be aware of the 'examples' directory. It holds examples on how to use the command language as a programming language. The 'ifwhiledemo' generates points in a loop and shows how to write cgx generated values to a file. The 'userDataset' shows how to generate a user dataset for a temperature field based on the z coordinate of the nodes.
It should be noted that a successive 'save' or 'exit' command will overwrite the batch file if it has the file-extension 'fbd'. To prevent this the user should use a different extension like 'fbl'.
When executing commands which increase the used space then it might happen that geometry is clipped and can not be seen or accessed anymore. In such a case a ``frame'' command is needed. This command is usually automatically triggered. Especially in batch mode without graphic output it solves sometimes strange situations.
If the command ``init'' or ``wsize'' is used then they have to be used in the very first line. Otherwhise the window dimensions take only effect after the batch file was completely parsed and executed.