It seems the debugger (idb) cannot access any of the variables in a program if the program was compiled with the option -save.
This does not explain the occasional loss of variable access posted in
a prior message. With -save the debugger cannot access any of the
ifort -save -O0 -g -o a.exe a.for
Any trivial test program will illustrate the problem.
idb on IA-32, Version 10.1-32, Build 20070828
ifort on IA-32, Version 10.1, Build 20070913
Please do not ask me why I have to deal with libraries which need this option.