ok thanks

I'm sorry, but if it's been installed correctly, and haven't been modified, then I don't know why you're receiving a null reference error. I'm currently busy with exams and have been tasked with writing a security program, but I'll see what I can do this christmas. I'll have to install SE again, though. My hard drive got fried and I haven't reinstalled it yet. In the meantime you can see if you can find a SolarMap mod in the workshop.

yes, coped from the script list, yes, yes, yes, and no. All the other scripts I used in the world work.

Is scripting enabled in the game/server settings?

Is the script copy-pasted from external sources, or subscribed to in the workshop and then added via the list of scripts in-game?

Is the Programmable Block running on its own without the help of a Timer Block?

Is the script compiled / recompiled properly?

Are you running an updated version of the game?

Is the game/server using a mod that modifies the Programmable Block's version or behavior?