Problem Description

Solution

It is easy to call executable programs from COMSOL Script with the DOS or SYSTEM command. What command to use depends on the operating system, DOS for Windows and SYSTEM for other operating systems.

The syntax is

[STATUS OUTPUT] = DOS(CMD)

where STATUS is an exit code and OUTPUT to the standard output and error streams. The DOS command can deliver limited input parameters to the external program. This is then done through the call, for example

[STATUS OUTPUT] = DOS('myprog 1 3 5 17')

For communication from the external program to COMSOL Script, the OUTPUT parameter can be used.

Another way to send input or output data to the external program is writing data to temporary files. The files can then be read by the external program or COMSOL Script. This can be suited for when the amount of data makes using the OUTPUT parameter difficult.

COMSOL Script can also be connected to external libraries written in other languages through the external API. For more information, see Knowledge base 1005.

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