Hi,

I try to write an application to exchange data with an external device (a
Programmable Logic Controller).  I want to use the dll that I received with
this device.  The application can read data in the device but when I quit
Squeak, the VM crashs every time.

This is the content of the crash.dmp file:

Exception code: C0000005
Exception addr: 77F63A05
Access violation (read access) at 00000000
EAX:00051DD4	EBX:0000000E	ECX:00000000	EDX:68C00000
ESI:00000000	EDI:000B03F0	EBP:0004F8CC	ESP:0004F8C8
EIP:77F63A05	EFL:00010293
FP Control: FFFF027F
FP Status:  FFFF5061
FP Tag:     FFFFFFFF

Current byte code: 227
Primitive index: 94
Stack dump follows:

30416204 EventSensor>ioProcess
30416420 [] in EventSensor>startUp
30416512 [] in BlockContext>newProcess

I join the source code in the file SAIA-Interface.st

To crash the VM, I do the following things in a workspace:

p _ PCDConn new.
p open.
p readR: 1000 count: 8.
p close.

Then I quit Squeak without saving and the VM crashs.

Can somebody give me help or tips or documentation ?

Thanks

Joseph Frippiat
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