Everytime i build a unit, i have to click on builders and assign them to the unit been built again. is there a solution to this?

Total Annihilation or Kingdoms?

Total annihalation - commander pack

You're left clicking to select the desired building from the menu and then left clicking to confirm the build location, right?

He means having builders assist in the construction of units. When you tell the builders to assist, are you clicking on the unit under construction or the building that is constructing it? If you are telling them to assist the building, then I don't know what to tell you.

no, im not building the building, the building is already built, it's a unit-producing building (aircraft factory) and i set other builders to help build these units. but everytime after a unit is finished, the builders stop assisting in production and just idle while another unit is been built.

It adds another level of unneccessary micromanagement, and i was wondering if there is a way to get around it.
Ah thanks wolfman, that may be it, ill give it a shot.

You need to use the guard option for the construction unit to assist production permanently. If the building is damaged it'll repair it first.

If you want to build units faster just build a second building.