$tarClientCmd = $bpc->cmdVarSubstitute($tarClientCmd, $args);
if ( !defined($t->{xferPid} = open(TAR, "-|")) ) {
$t->{_errStr} = "Can't fork to run tar";
$tarClientCmd = $bpc->cmdVarSubstitute($tarClientCmd, $args);
if ( !defined($t->{xferPid} = open(TAR, "-|")) ) {
$t->{_errStr} = "Can't fork to run tar";