How to implement multiple data outputs

[NineSwords-Z]

hi all, I tried to modify the XML file to achieve multi-channel data output, but the XML file parsing failed, how can I modify the XML file? Thank you very much.
xml file:

cmd print:
`.\JSBSim.exe --realtime data_output/flightgear2.xml scripts/c1723.xml

In file data_output/flightgear2.xml: line 20
XML parse error: junk after document element
FATAL ERROR: JSBSim terminated with an exception.
The message was: In file data_output/flightgear2.xml: line 20
XML parse error: junk after document element`

[seanmcleod]

Just to confirm I can reproduce the issue you're seeing. Although as per @bcoconni's recent work on XML validation he mentions that multiple <output /> elements are supported at least as part of fdm_config.

[seanmcleod]

Ah, the XML file you created isn't a valid XML file in general. A single top-level element is required.

https://stackoverflow.com/questions/14388122/multiple-xml-elements-in-the-same-xml-file

[bcoconni]

In addition you should be able to supply as many output files to JSBSim.exe as you like. Say you have 2 output files data_output/flightgear.xml and data_output/flightgear2.xml then you can use the following command line:

JSBSim.exe --realtime scripts/c1723.xml data_output/flightgear.xml data_output/flightgear2.xml

For your problem you can create 2 files, one containing

<?xml version="1.0" encoding="utf-8"?>
<output name="localhost" type="FLIGHTGEAR" protocol="UDP" port="5550" rate="60" version="24">
</output>

and the other file containing

<?xml version="1.0" encoding="utf-8"?>
<output name="localhost" type="FLIGHTGEAR" protocol="UDP" port="5550" rate="60" version="24">
</output>

and use them as suggested above.

[NineSwords-Z]

Thanks, that's the right answer.