Hi. Thanks people. I feel I am compliant with requests with the following in the .pm module and .pl program.

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Within the .pm module
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package Serial;

require Exporter;
Exporter->import('import'); 

#Now declare what we permit to be visible within this module.
our @EXPORT = qw( &Serial_Init &Serial_TrxRcv &Serial_Close);

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Within the test .pl program
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use lib '.';      # The Serial.pm is in the current folder

use Serial;       # use a "1 off type of macro expansion" of the Seria
+l module

Serial_Init();    # Initialise the interface

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I find the line in .pm of "Exporter->import('import');" to be un-intuitive. Possibly it relates to the importing on the .pl program ?

I need to check out module CLI (ta)

Regards JC.....