add catch for std base exception and print unknown

acat2/src/acat.cpp

aconversions2/src/aconversion.cpp

aconvert2/src/aconvert.cpp

aderivation2/src/aderivation.cpp

adeterminize2/src/adeterminize.cpp

adiff2/src/adiff.cpp

aepsilon2/src/aepsilon.cpp

aintegral2/src/aintegral.cpp

aminimize2/src/aminimize.cpp

anormalize2/src/anormalize.cpp

arand2/src/arand.cpp

arename2/src/arename.cpp

arun2/src/arun.cpp

astat2/src/astat.cpp

astringology2/src/astringology.cpp

atrim2/src/atrim.cpp