AOB Scanning System.OverflowException' in Memory.dll

[GameplayGoon]

Using Memory.dll 1.2.24

When scanning specific areas of this game process it often seems very buggy and the scan just fails instantly showing the following. When scanning specific game modules in the game process for example an address in halo1.dll module this seems fine, but when scanning the games map files it seems very buggy even when supplying a start and end scan region. Sometimes the scan works maybe 1 in 10 chance... The address im looking for is part of the .map file that the game reads from not sure if this helps make a difference. The scan works fine in Cheat Engine etc

Edit: I did some more testing, the game im using by the way is Halo MCC on steam. Using the same code to scan other areas of the game are working fine currently. They work everytime but scanning the region below in two different games just fail very often to even begin.

Code Used(Visual Basic)
m.AoBScan(&H7FF400000000, &H7FF500000000, "03 00 00 00 26 05 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00", True).Result.FirstOrDefault.ToString("X8")

[DEBUG] memory scan starting... (start:0x00007ff400000000 end:0x00007ff500000000 time:9:25:08 PM)
Exception thrown: 'System.OverflowException' in Memory.dll
An exception of type 'System.OverflowException' occurred in Memory.dll but was not handled in user code
Arithmetic operation resulted in an overflow.

https://i.imgur.com/541l4dL.png