faq ]] . CompHEP . ... Installation . ... Q: When I try to display squared diagrams for 6 final particles the CompHEP stops . ... Read the FAQ page, . ... Old versions of CompHEP (e.g. 33.23, see the 'Downloads' page) could be installed on HP, SUN and DEC platforms. ... The installation of some versions earlier than 4.4 on 64bit lxplus.cern.ch machines, where 32bit libisajet and libmath from cernlib are found by ./configure in the directory /cern/pro/lib may require the following steps: . ...