Ok. 280 is the magic number. It does not crash with 
if (numDataSources > 280) {
   break;
}.

[download]
And it does crash if i change to 
if (numDataSources > 281) {
   break;
}.

[download]
(The first DSN actually has numDataSources == 0).

Update:

There is nothing wrong with the next DSN, when i go to 281 the next one is still retrieved (like with all 310 entries) but it crashes still.

The last lines of the output are in that case (before crashing):

(I added "numDataSources" in the output as you can see:) 
/(276)/, /DF203BPA/ (8), /IBM DB2 ODBC DRIVER - DB2RTCL9N/ (31)
/(277)/, /DF203BPE/ (8), /IBM DB2 ODBC DRIVER - DB2RTCL9N/ (31)
/(278)/, /DF203BS/ (7), /IBM DB2 ODBC DRIVER - DB2RTCL9N/ (31)
/(279)/, /DF203BPM/ (8), /IBM DB2 ODBC DRIVER - DB2RTCL9N/ (31)
/(280)/, /DF203CEI/ (8), /IBM DB2 ODBC DRIVER - DB2RTCL9N/ (31)
/(281)/, /DF203CMN/ (8), /IBM DB2 ODBC DRIVER - DB2RTCL9N/ (31)

[download]

In reply to Re^11: Strawberry Perl 64bit on Win7 crashes on DBI-function by theman824
in thread Strawberry Perl 64bit on Win7 crashes on DBI-function by theman824

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