Paired Samples Dialog: Fix broken logic

[pspp] / perl-module / lib / PSPP.pm.in

diff --git a/perl-module/lib/PSPP.pm.in b/perl-module/lib/PSPP.pm.in
index a99c77db275aed0c4345893be575669e5c9c0573..be4b02ea3c8c432b1e23310e7356b66587be4415 100644 (file)
--- a/perl-module/lib/PSPP.pm.in
+++ b/perl-module/lib/PSPP.pm.in
@@ -402,7 +402,8 @@ package PSPP::Sysfile;
 =head3 new ($filename, $dict [,%opts])
 
 Creates a new system file from the dictionary C<dict>.  The file will
-be written to the file called C<filename>.
+be written to the file called C<filename>. The string C<filename> must 
+be encoded in UTF-8.
 C<opt>, if specified, is a hash containing optional parameters for the
 system file.  Currently, the only supported parameter is
 C<compress>. If C<compress> is non zero, then the system file written
@@ -481,7 +482,15 @@ Opens a system file for reading.
 
 Open is used to read data from an existing system file. 
 It creates and returns a PSPP::Reader object which can be used to read 
-data and dictionary information from C<filename>.
+data and dictionary information from C<filename>.  The string C<filename> 
+must be in UTF-8 encoding.
+
+=head3 get_case_cnt ()
+
+Returns the number of cases in a open system file.  Some files
+do not store the number of cases.  In these instances undef
+will be returned.  Therefore, then programmer must check that the
+returned value is not undef before using it.
 
 =cut