how to resolve this symfony error :

C:\inetpub\wwwroot\project\trunk\preprod\signup>php symfony doctrine:build-schema --trace
>> doctrine  generating yaml schema from database

  [sfException]
  Unknown relation alias table_name

Exception trace:
  at C:\inetpub\wwwroot\project\trunk\preprod\signup\lib\vendor\symfony\lib\plugins\sfDoctrinePlugin\lib\cli\sfDoctrineCli.class.php:69
 sfDoctrineCli->notifyException at C:\inetpub\wwwroot\ project\trunk\preprod\signup\lib\vendor\symfony\lib\plugins\sfDoctrinePlugin\lib\ven
dor\doctrine\Doctrine\Cli.php:93
 Doctrine_Cli->run at C:\inetpub\wwwroot\project\trunk\preprod\signup\lib\vendor\symfony\lib\plugins\sfDoctrinePlugin\lib\task\sfDoctrineB
aseTask.class.php:112
 sfDoctrineBaseTask->callDoctrineCli at C:\inetpub\wwwroot\project\trunk\preprod\signup\lib\vendor\symfony\lib\plugins\sfDoctrinePlugin\li
b\task\sfDoctrineBuildSchemaTask.class.php:57
 sfDoctrineBuildSchemaTask->execute at C:\inetpub\wwwroot\project\trunk\preprod\signup\lib\vendor\symfony\lib\task\sfBaseTask.class.php:63

 sfBaseTask->doRun at C:\inetpub\wwwroot\project\trunk\preprod\signup\lib\vendor\symfony\lib\task\sfTask.class.php:77
 sfTask->runFromCLI at C:\inetpub\wwwroot\ project\trunk\preprod\signup\lib\vendor\symfony\lib\command\sfSymfonyCommandApplication.class.ph
p:76
 sfSymfonyCommandApplication->run at C:\inetpub\wwwroot\project\trunk\preprod\signup\lib\vendor\symfony\lib\command\cli.php:20
 include at C:\inetpub\wwwroot\project\trunk\preprod\signup\symfony:14

It is a model and cache issue (reset all configuration and erase model and data files)

rm config/doctrine/schema.yml
rm -r cache/*
rm -r data/*
rm -r lib/model/doctrine/base

symfony cc

I found a second response, using builder.php patch to have doctrine object getters in symfony 1.2 cast this error also.