I have upgraded my IRX4 4 in 1 module to a version 1.3.xxx level firmware from the multimodule site. The module works fine in all radios such as the Frsky Taranis etc., but will not go into PPM mode (Green light off) when I want to use it for older radios with PPM mode such as the JR PCM 10X. It appears to be stuck in serial mode. I have also tried upgrading with a ppm -based firmware from the site but the behaviour is the same.

I am experiencing an issue when the Arduino IDE is compiling for a Multi-4-in-1 board, and I am logged in with a windows username that contains a space.

During the linking stage an error is thrown right after successful execution of: do_version.bat

The error is thrown in the middle of my windows user name, (again, contains a space).

i.e User is 'My Name',
The error thrown is: 'C:\Users\My' is not recognized as an internal or external command

When I run under a Windows user that doesn't contain a space, the compile completes successfully. I believe this is related to something in the linking process.

Note: I can compile code when other than a 'Multi-4-in-1 ' AVR board is selected (i.e compile for Arduino Mini works fine with username containing a space.)