procedure:

1) setup area with megatest -create-megatest-area
no change to megatest.config
2) create runconfig:
#####
[default]
ALLTESTS verdi_gui_t

[bb_f65]
SDE_ROOT

#####
3) created testconfig
######
[itemstable]
proj    willard                         nsc_ip
repo    asic-willard-a0                 ip-nsc-2.1
relpath
target  arb_mr_test_check               axi_agent_test_sim
sderel  f61                             f65

[ezsteps]
run run.csh

[logpro]
run ;;
  (expect:skip     in "LogFileBody" = 0 "SKIPME" \
    #/skipping.  does not apply/)
#########


megatest -run -testpatt % -target bb_f65 -runname ww31.1b -clean-cache

-run -testpatt % -target bb_f65 -runname ww31.1b -clean-cache
INFO: (0) No cached megatest or runconfigs files found. None removed.
INFO: Trying to start server (megatest -server -m testsuite:verdi_int_reg) ...

Error: (-) bad argument type: Adding

        Call history:

        common_records.scm:140: debug:debug-mode
        common.scm:1624: current-seconds
        common.scm:1624: file-change-time
        common.scm:1626: with-input-from-file
        numbers.scm:1720: %string->compnum
        numbers.scm:1672: scan-real
        numbers.scm:1671: scan-ureal
        numbers.scm:1603: scan-digits+hashes
        numbers.scm:1549: scan-digits
        numbers.scm:1531: lp
        numbers.scm:1531: lp
        numbers.scm:1548: g1937
        common.scm:1620: k2830
        common.scm:1620: g2834
        common.scm:1870: max
        common.scm:1873: max            <--