I'm running 1.1.5.1 - and whenever I try to select a palette in the Color tab, I get the following error:

___________________________________________
############################################################################################
ERROR in
action number 1
of Draw Event
for object uiList:

File is not opened for reading.
at gml_Script_load_custom_palette
############################################################################################
--------------------------------------------------------------------------------------------
stack frame is
gml_Script_load_custom_palette (line -1)
gml_Object_uiList_Draw_0

Tried to reproduce but not happens to me. Can you tell the steps please? I added custom palettes or changed for default ones and all worked without problems ¿?.

I have the program in a folder on my D: drive

- start the program

- load a preset ppd file from the examples folder

- press play (it animates fine) 

- press stop

- press the color tab

- select any palette other than "none" 

- the program crashes

Oh! You're right, i reproduced now the error. Thanks for the report! hope to be fixed in next update.