Flow variables missing or not working

Hi eveyone,

Sometimes I feel a bit lost with the flow variables. It is really usefull when it works but when it does not, it is really frustrating. Here are two problems I met recently about these :

Problem 1 - File Reader module

In the “File Reader” module, I would like to store the file path in a variable called in this module :

It shoudl be possible but when I try to call the flow variable with “Use Variable”, the option is not available :

Does someone have an idea if there is a solution ?

Problem 2 - Flow variable not working on components

When I use the modules in the normal interface, there is no problem with the flow variables, everything is working perfectly :

I use them to set the graphs axis labels just fine :

But when I convert these “Line Plot” into a component, the flow variable are not recognized anymore so it doesn’t work :

Does someone have an idea why with the components it is not working anymore (but it works with metanode) ?

Thank you and have a nice weekend.