System error

error:  Can't connect to data source '' because I can't work out what driver to use (it doesn't seem to contain a 'dbi:driver:' prefix and the DBI_DRIVER env var is not set) at /usr/local/lib/site_perl/DataControl.pm line 149.
context: 
... 
162:  local @CARP_NOT = $cgc ? $cgc->() : caller();
163:  shortmess_heavy(@_);
164:  }
165: 
166:  sub croak { die shortmess @_ }
167:  sub confess { die longmess @_ }
168:  sub carp { warn shortmess @_ }
169:  sub cluck { warn longmess @_ }
170: 
... 
code stack:  /usr/share/perl/5.22/Carp.pm:166
/usr/lib/x86_64-linux-gnu/perl5/5.22/DBI.pm:627
/usr/local/lib/site_perl/DataControl.pm:149
/home/jim/SANDBOX/AAP/autohandler:91
raw error






























Can't connect to data source '' because I can't work out what driver to use (it doesn't seem to contain a 'dbi:driver:' prefix and the DBI_DRIVER env var is not set) at /usr/local/lib/site_perl/DataControl.pm line 149.


Trace begun at /usr/share/perl5/HTML/Mason/Exceptions.pm line 125
HTML::Mason::Exceptions::rethrow_exception('Can\'t connect to data source \'\' because I can\'t work out what driver to use (it doesn\'t seem to contain a \'dbi:driver:\' prefix and the DBI_DRIVER env var is not set) at /usr/local/lib/site_perl/DataControl.pm line 149.^J') called at /usr/share/perl/5.22/Carp.pm line 166
Carp::croak('Can\'t connect to data source \'\' because I can\'t work out what driver to use (it doesn\'t seem to contain a \'dbi:driver:\' prefix and the DBI_DRIVER env var is not set)') called at /usr/lib/x86_64-linux-gnu/perl5/5.22/DBI.pm line 627
DBI::connect('DBI', undef, undef, undef) called at /usr/local/lib/site_perl/DataControl.pm line 149
DataControl::connectToDB('DataControl', 'aap') called at /home/jim/SANDBOX/AAP/autohandler line 91
HTML::Mason::Commands::__ANON__ at /usr/share/perl5/HTML/Mason/Component.pm line 135
HTML::Mason::Component::run('HTML::Mason::Component::FileBased=HASH(0x558fd2a6c720)') called at /usr/share/perl5/HTML/Mason/Request.pm line 1300
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 1292
HTML::Mason::Request::comp(undef, undef, undef) called at /usr/share/perl5/HTML/Mason/Request.pm line 481
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 481
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 433
HTML::Mason::Request::exec('HTML::Mason::Request::ApacheHandler=HASH(0x558fd2a397f8)') called at /usr/share/perl5/HTML/Mason/ApacheHandler.pm line 165
HTML::Mason::Request::ApacheHandler::exec('HTML::Mason::Request::ApacheHandler=HASH(0x558fd2a397f8)') called at /usr/share/perl5/HTML/Mason/ApacheHandler.pm line 831
HTML::Mason::ApacheHandler::handle_request('HTML::Mason::ApacheHandler=HASH(0x558fd1305e38)', 'Apache2::RequestRec=SCALAR(0x558fd2a2ba00)') called at (eval 26) line 8
HTML::Mason::ApacheHandler::handler('HTML::Mason::ApacheHandler', 'Apache2::RequestRec=SCALAR(0x558fd2a2ba00)') called at -e line 0
eval {...} at -e line 0