Can you have comments in the JSB2 file?

[mark.lancaster]

I'm trying to build a cut down version of the Ext All library by commenting out unwanted components in a copy of the ext.jsb2 file.

I've tried to comment out lines using // and /* */, but this results in errors when you attempt to build:

Missing value at character 26375
Failed to open project file.
java.lang.NullPointerException
        at com.extjs.JSBuilder2.createTempHeaderFile(JSBuilder2.java:141)
        at com.extjs.JSBuilder2.main(JSBuilder2.java:38)
Failed to create temporary header file.
....more snipped... 

Can lines be commented out, or do they have to be removed?

Mark