There seems to be an issue with reloading scripts where lots of data is added to a ds_list, thankfully I've found a workaround so hopefully this is useful to someone.
Was getting this error when reloading the create event of a particular object
[live][20/07/2022 10:23:23] Runtime error: [error] { line : 534, script : "gml_Script_vm_group_field_on_field_set", message : "DoSub :2: illegal array use", longMessage : "ERROR in action number 1 of Other Event: User Defined 10 for object obj_bedeBoss:
DoSub :2: illegal array use at gml_Script_vm_group_field_on_field_set (line 534) - var l_z=l_st[0]-1; ", stacktrace : [ "gml_Script_vm_group_field_on_field_set (line 534)","gml_Script_anon_gml_thread_gml_GlobalScript_GMLive_thread_3298_gml_thread_gml_GlobalScript_GMLive_thread (line 109) - var l_ar1=l_handler(l__gthis,l_act); ","gml_Script_anon_gml_program_gml_GlobalScript_GMLive_program_1897_gml_program_gml_GlobalScript_GMLive_program (line 58) - l_th.h_exec(); ","gml_Script_live_proc_call_impl (line 33) - var l_th=l_pg.h_call_v(l_scriptName,l_args1,false); ","gml_Script_live_call (line 74) - return live_proc_call_impl(l_data,l_vals,l_def); ","gml_Object_obj_bedeBoss_Other_20 (line 2) - if (live_call()) return live_result; ","gml_Object_obj_bedeBoss_Step_0 (line 3)" ] } called from game:gml_std_haxe_Exception_caught:1235 called from game:anon_gml_thread_gml_GlobalScript_GMLive_thread_3298_gml_thread_gml_GlobalScript_GMLive_thread:119 called from game:anon_gml_program_gml_GlobalScript_GMLive_program_1897_gml_program_gml_GlobalScript_GMLive_program:58 called from game:live_proc_call_impl:33 called from game:live_call:74 called from game:obj_bedeBoss_Other_20:2 called from game:obj_bedeBoss_Step_0:3 called from 0 called from obj_bedeBoss:Other_20[L221,c36]
Tracked the culprit down to this particular piece of the script
ds_attack_sequence[4] = ds_list_create(); ds_list_add(ds_attack_sequence[4], "set pdata",0,1.5,260,24,14, "starfan1","wait15", "set pdata",0,1.5,265,24,14, "starfan1","wait15", "set pdata",0,1.5,270,24,14, "starfan1","wait15", "set pdata",0,1.5,275,24,14, "starfan1","wait15", "set pdata",0,1.5,280,24,14, "starfan1","wait60", "set pdata",0,1.5,280,24,14, "starfan1","wait15", "set pdata",0,1.5,275,24,14, "starfan1","wait15", "set pdata",0,1.5,270,24,14, "starfan1","wait15", "set pdata",0,1.5,265,24,14, "starfan1","wait15", "set pdata",0,1.5,260,24,14, "starfan1","wait60" );Commented out, it would reload fine and not throw the error. When I split the data between two different ds_list_add functions I no longer got the error.
ds_attack_sequence[4] = ds_list_create(); ds_list_add(ds_attack_sequence[4], "set pdata",0,1.5,260,24,14, "starfan1","wait15", "set pdata",0,1.5,265,24,14, "starfan1","wait15", "set pdata",0,1.5,270,24,14, "starfan1","wait15", "set pdata",0,1.5,275,24,14, "starfan1","wait15", "set pdata",0,1.5,280,24,14) ds_list_add(ds_attack_sequence[4], "starfan1","wait60", "set pdata",0,1.5,280,24,14, "starfan1","wait15", "set pdata",0,1.5,275,24,14, "starfan1","wait15", "set pdata",0,1.5,270,24,14, "starfan1","wait15", "set pdata",0,1.5,265,24,14, "starfan1","wait15", "set pdata",0,1.5,260,24,14, "starfan1","wait60" );Don't know why this happens but I hope this is helpful. This is on runtime v2022.5.2.13