Hi All,

  I am using demeter on Mac OS 10.15 (the latest release) and am encountering some problems that I was hoping could be cleared up, in particular with Athena. The Athena version is 0.9.25, the latest version from MacPorts.  Athena starts and properly plots existing projects without trouble, but trying to open a new data set using the PFBL12C plug in. From the Perl error messages below, it appears that the underlying cause is not from the Plugin, but from some problem within Demeter, with an uninitialized values in particular at line 115 that starts with the “my $text” assignment.  Any ideas on what could be going wrong or what other debugging information might be useful.

Paul Fons

Arrays.pm

sub get_array {

  my ($self, $suffix, $part) = @_;

  $part ||= q{};

  if (not $self->plottable) {

    my $class = ref $self;

    croak("Demeter: $class objects have no arrays associated with them and are not plottable");

  };

  my $group = $self->group;

  my $text = ($part =~ m{(?:bkg|fit|res|run)}) ? "${group}_$part.$suffix" : "$group.$suffix";

  my @array = $self->fetch_array($text);

  return @array;

};

Perl error messages:

16:07:51: Use of uninitialized value $suffix in concatenation (.) or string at /opt/local/lib/perl5/site_perl/5.26/darwin-thread-multi-2level/Demeter/Data/Arrays.pm line 115.

16:07:51: Use of uninitialized value in concatenation (.) or string at /opt/local/lib/perl5/site_perl/5.26/darwin-thread-multi-2level/Demeter/Data/Mu.pm line 231.

16:07:51: Use of uninitialized value in concatenation (.) or string at /opt/local/lib/perl5/site_perl/5.26/darwin-thread-multi-2level/Demeter/Data/Mu.pm line 232.

16:07:51: Use of uninitialized value in concatenation (.) or string at /opt/local/lib/perl5/site_perl/5.26/darwin-thread-multi-2level/Demeter/Data/Mu.pm line 233.

16:07:51: Use of uninitialized value in concatenation (.) or string at /opt/local/lib/perl5/site_perl/5.26/darwin-thread-multi-2level/Demeter/Data/Mu.pm line 233.

16:07:51: Use of uninitialized value in concatenation (.) or string at /opt/local/lib/perl5/site_perl/5.26/darwin-thread-multi-2level/Demeter/Data/Mu.pm line 234.

Fragment of example data set causing trouble

9809 SPring-8 01b1

GeTe_reference 19.10.31 11:20 - 19.10.31 11:22

Te standard

Ring : 8.0 GeV 99.5 mA - 99.5 mA

Mono : SI(311) D= 1.63747 A Initial angle= 7.06039 deg

01b1 Transmission( 2) Repetition= 1 Points= 4798

Param file : angle axis (1) Block = 1

Block Init-ang final-ang Step/deg Time/s Num

1 7.00000 6.52000 -0.000100 0.03 4798

Ortec( 0) NDCH = 4

Angle(c) Angle(o) time/s 2 3 4

Mode 0 0 1 2 1

Offset 0 0 49961.200 49083.900 1124.500

6.99980 7.00417 0.025 121003 450174

6.99970 7.00407 0.025 120103 447134

6.99960 7.00398 0.025 120212 447353

6.99950 7.00388 0.025 120465 448618

6.99940 7.00379 0.025 121167 450721

6.99930 7.00370 0.025 120510 448136

6.99920 7.00361 0.025 120907 450140

6.99910 7.00352 0.025 120063 446166

6.99900 7.00343 0.025 120656 449360

6.99890 7.00335 0.025 120901 450062

6.99880 7.00326 0.025 120820 449932

6.99870 7.00317 0.025 120655 448835

6.99860 7.00308 0.025 120869 449502

6.99850 7.00299 0.025 120818 449723

6.99840 7.00290 0.025 121239 450978

6.99830 7.00280 0.025 120744 449404