[BLACKBOX] FW: [BLACKBOX] Windows 7

From: Campbell, Robert (SELEX GALILEO, UK) <robert.d.campbell{([at]})nowhere.xy>
Date: Wed, 8 Aug 2012 11:01:42 +0000

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>> [Sudden idea as I write this; yes I can!. They use a 64-bit version of HostFiles -
>> written by Oms - maybe the problem is there.
>> I need to investigate!]


No problem with the 64-bit version of HostFiles.


The problem is related to requests for large amounts of memory.

I uses 'Matrices' (POINTER TO ARRAY OF POINTER TO ARRAY OF BYTE / SHORTINT / INTEGER / SHORTREAL / REAL etc).

When I reduce the array sizes (by changing the bounds and downsizing from REAL to BYTE) my application runs ok.


My test program (calculate Pi to 5 million digits) uses a lot of memory, but not enough to break Windows 7.


So, provisional conclusion, significantly less memory is available to users under Windows 7, and when you exceed the limit
the machine crashes in a (*very*) user unfriendly manner.

Under XP, when I ask for more memory than NEW can allocate, I get a sensible error message saying my pointer is still NIL. It
seems that 7 gives me a non-NIL pointer pointing to invalid memory. Great!


Regards

Robert - Have a nice day!
SELEX Galileo Ltd
Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 3EL
A company registered in England & Wales. Company no. 02426132
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Received on Wed Aug 08 2012 - 13:01:42 UTC