Keil issues with TouchGFX

hi

I'm very new with TouchGFX. I created a simple project with TouchGFX for STM32f746-Disco board and if I run the project through the TouchGFX by Run target, the project will be downloaded to the board completely! But when i compiled the project in keil ver 5.2 it will give me this error:

Insufficient RAM for Flash Algorithms !

it means that there are many unused files in the keil project that made the program so heavy.

is there any way to solve the problem ?