limit number of variables for FileExchange.bnet2primes?

[Anonymous]

Hi Hannes,

I am recently using PyBoolNet again, and I forgot, what is the maximal
number of variables for
"bnet2primes" function?

P.S. The process I am repeating is:
1. from PyBoolNet import FileExchange as FEX
from PyBoolNet import QuineMcCluskey as QMC
2. primes = FEX.bnet2primes("filename.bnet")
3. mindnf = QMC.primes2mindnf(primes)

In the FEX.bnet2primes, I tried a file .bnet with more than 500
minterms, and they have 21 variables, which is more than the limit, for
there throw out an Exception:

{"sss":[
BNetToPrime encountered an exception and aborted.
Exception message: "std::bad_alloc"

Call to "BNet2Prime" resulted in return code 1
Command:
python2.7/site-packages/PyBoolNet/Dependencies/BNetToPrime/BNetToPrime
Minterms508_21variables.bnet
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File
"python2.7/site-packages/PyBoolNet/FileExchange.py",
line 83, in bnet2primes
_bnet2primes_error(proc, out, err, cmd)
File
"python2.7/site-packages/PyBoolNet/FileExchange.py",
line 32, in _bnet2primes_error
raise Exception
Exception</module></stdin>

[Hannes Klarner]

can you send me the bnet file? I am not sure what the limit is, but you are right: std::bad_alloc sounds like running out of memory and 21 might be too many variables.

[Anonymous]

Thank you, Hannes.

I had a test with only 30 minterms differing from 13 variables to 20 variables.
PyBoolNet works quite very fast for 13 ~ 18, and slower when dealing with 19 and 20 variables. (See the screen shot below.)

So I have to say, the number of minterms has a limit depending on the memory of the computer. I tried over 500, it was too much for my computer.

Wishes,
L.