In runconfig files, common mistakes like creating a dividing line with ******** or accidentally wrapping a line, eg

yvar -ot foo.4.ot
to
myvar -ot foo<newline>
.4.0t


Result in errors in csh and warnings in bash like
./megatest.sh: line 75: export: `.4.ot=': not a valid identifier

When creating megatest.csh/.sh, lets filter and warn when a env var name is invalid, that is does not begin with an alphabetic