I initially suggested 3700 because I knew it to be safe. 
Subsequently, some folks have gone as high as 4000 or even
4090, and claim to have no problems. However, 4900 would
not work, I can promise you.

Below is a little more detail from the GeoInfo Database. Note 
that this was written by a Geoworks engineer about version
1.0, so the size of the kernel data might be different in the
newer versions. 64k (65535) divided by 16 is 4096. So if 4090 
is working, perhaps the kernel data has been moved into its own 
segment in 2.0.

--------------------
GEOS: Handles, why the 3500 limit?

3500 not an arbitrary limit. Each handle requires 16 bytes. 3500 handles
requires 56,000 bytes. The GEOS 1.0 kernel has about 6100 bytes of data,
so together you've got 62,000 bytes of fixed kernel data, or 3,000 bytes
fewer than the maximum segment size of 64K. 3500 is a nice round number
with enough allowance for the kernel data requirements to grow, if need
be.

Article#0355
Updated 05/29/96
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Steve  Main