PRINT Variable error

Hi, i have problem with printing a variable, actually i can't do almost anything with the variable As you can see on the image on 215th line, there is written "PRINT SAV[2]" SAV is a variable, but once the program gets to this line it says "Subscript out of range" here on the 7th line you can see that there is a variable called SAV[5], so there shouldn't be any problem... here you can see i tried printing the variable before the LOAD command and it worked... it printed the variable without any problems! then i tried printing it after the LOAD command

LOAD "DAT:SAVE",SAV,FALSE
PRINT SAV[2]

and it said that there is the "Subscript out of range" error again. Why does this happen and how can i fix it?

Just answered it on Miiverse, but just to have the answer here as well:

LOAD automatically resizes the array to the size of the file. Your save file seems to be less than three values long, so it shrinks and SAV[2] is no longer valid.

As for fixing it, I guess a simple way you might do it is something like this:

DIM WINS,TUTORIAL,SAV[5],SELECT
'Load file if it exists
IF CHKFILE("DAT:SAVE") THEN
 LOAD"DAT:SAVE",SAV,FALSE
ENDIF
IF LEN(SAV)!=5 THEN
 PRINT "Invalid save file"
 STOP
ENDIF

Something more advanced might try to recognize save files from older versions of the game and convert them; a good way of doing this is to have a version number at the beginning of the save file.