no children error while executing the script

Can anyone tell me what does this error message mean?.


no children
    while executing
"exp_wait -nowait -i -1"
    (procedure "logOptions" line 45)
    invoked from within
"logOptions"
    (procedure "doExecute" line 98)
    invoked from within
"doExecute"
    (procedure "main" line 32)
    invoked from within
"main $argc $argv"