before doing any extrudes you should wait for your hotend to reach the target temperature. My guess is the following:

1. your gcode sets the target bed temperature and waits for it to be reached using M190
2. after the bed temperature is reached, your gcode sets the target extruder temperature using M104
3. The printer homes
4. After the homing procedure the printer tries to extrude.

The issue here is that your hotend does not reach the target temperature during the homing process. So once the homing process finishes, the hotend is still too cold causing the error.

There are two ways to fix this:

• Replace the M104 g-code in your start script with a M140, this will cause the printer to wait for the hotend to heat up before starting the homing process
• Add an additional M140 after your homing command (G28), this means that the printer will heat up while homing, and wait for the target temperature to be reached AFTER the homing process is done BEFORE trying to perform any moves that extrude material.

If this doesn't solve your problem please also share an example g-code file that produces the error.

Hope that helps,
Florian

Yepp that did the trick! Thanks! Although your suggestion wasnt quite right. I had to replace M104 with M109. Now it works tho

I keep mixing those 4 commands up ^^ glad you figured it out. Happy printing!