Why FileAccess.open returns null?

[positron]

Godot Version

4.3 stable

Question

Code:

func _write_log():
	var path = "user://conosolelogs"
	var time : String = Time.get_time_string_from_system()
	var filename : String = "consolelog_"+time+".txt"
	var dirAccess = DirAccess.open("user://")
	
	if dirAccess == null:
		print("DirAccess is null")
	else:
		dirAccess.make_dir(path)
	
	var file = FileAccess.open(path+filename, FileAccess.WRITE)
	
	file.store_line("test") # error here
	file.close()

Error message: Attempt to call function ‘store_line’ in base ‘null instance’ on a null instance.

The directory “conosolelogs” was created successfully, but it seems to not be able to open the file. Does anyone know how to fix this?

Thanks in advance!

[FencerDevLog]

@positron

var file = FileAccess.open(path+filename, FileAccess.WRITE)

Try to use path + "/" + filename

[positron]

I definitely had to write "/consolelog_"+time+".txt" or path+"/"+filename but still the same error occurs.

[gertkeno]

you can detect open errors with FileAcess.get_open_error()

var file := FileAccess.open(path.path_join(filename), FileAccess.WRITE)
if file == null:
	var error_str: String = error_string(FileAccess.get_open_error())
	push_warning("Couldn't open file because: %s" % error_str)

It looks like your time variable contains colons :, which are illegal filename characters in Windows.

[positron]

Changing Time.get_time_string_from_system() to Time.get_date_string_from_system() solved this problem and now it works without any errors or warnings. Thanks!