32MB of free storage should be sufficient for the installer, so I'm not sure what your problem is. I just tested installing under TSO OMVS with REGION=100000K and it worked fine.
Could it be possible that the install file has been corrupted? Perhaps you uploaded it without binary.
To check the installer file, do this under a z/OS Unix shell:
You should get the same numbers for checksum and size.
As I suggested before, I would recommend that you login to a z/OS Unix shell using ssh (for example, using PuTTY) and try installing there rather than under TSO OMVS.
Definately a bad FTP upload, I deleted and uploaded again:
# cd /usr/bin/
# cksum coz-1.9.0.bin
3093313626 11215567 coz-1.9.0.bin
# ./coz-1.9.0.bin
:
:
Do you agree ...
I received the same "not enough memory" error and discovered that it was due to not uploading the bin file in binary format. Once the bin file was uploaded as binary it worked fine.