Mamba allocation error during data transfer (after posting a DEMAND)

After detecting a number of OFFERed cdos and DEMANDing them, there is an error:

[E:mamba] Multio Maestro Syphon PC (ortolan 11529) 12842810693982: mmb_allocate__linux_dram(providers/linux_native.c:106) Could not allocate 13796392896786 bytes for mmbAllocation.

This has been reproduced on at least two different machines and three different compilers using one of our producer-consumer demonstrators.