i keep getting an error on the same line

[matt]

the error message was ---------------------------
Illegal exception
---------------------------
An exception 0xC0000005 occured in ACWIN.EXE at EIP = 0x00472157 ; program pointer is +6, ACI version 2.72.920, gtags (7,200)

AGS cannot continue, this exception was fatal. Please note down the numbers above, remember what you were doing at the time and notify CJ on the Tech forum.

in Global script (line 231)


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---------------------------
OK   
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line 231 was:

DynamicSprite* ds = DynamicSprite.CreateFromExistingSprite(slot);

and the int, slot, is: int slot = (in8+in9)/2;
any help would be great ,thanks.

[Khris]

The obvious question: is there a sprite in the calculated slot?