Creating a dropdown from vtlib

[Guido1982]

For my ExactOnline module, I'm in the process of syncing the general ledgers to coreBOS from Exact. I created a dropdown in products like this:

PHP Code:

$Vtiger_Utils_Log = true;
 include_once('vtlib/Vtiger/Menu.php');
 include_once('vtlib/Vtiger/Module.php');
 $module = Vtiger_Module::getInstance('Products');
 $infoBlock = Vtiger_Block::getInstance('LBL_PRODUCT_INFORMATION', $module);
 $glaccountsField = Vtiger_Field::getInstance('generalledgers', $module);
 if (!$glaccountsField) {
 $glaccountsField = new Vtiger_Field();
 $glaccountsField->name = 'generalledgers';
 $glaccountsField->label = 'General Ledger Accounts';
 $glaccountsField->column = 'generalledgers';
 $glaccountsField->columntype = 'VARCHAR(255)';
 $glaccountsField->uitype = 16;
 $glaccountsField->typeofdata = 'V~M';
 $glaccountsField->setPicklistValues($GLAccountValues);
 $infoBlock->addField($glaccountsField);
 } 


This works, but does produce errors, what am I doing wrong? Here are the errors:

PHP Code:

Strict Standards: Only variables should be assigned by reference in /PATH/crmdevelop/include/database/PearDatabase.php on line 225
Creating table vtiger_generalledgers ... DONE

Strict Standards: Only variables should be assigned by reference in /PATH/crmdevelop/include/database/PearDatabase.php on line 225

Strict Standards: Only variables should be assigned by reference in /PATH/crmdevelop/include/database/PearDatabase.php on line 225

Strict Standards: Only variables should be assigned by reference in /PATH/crmdevelop/include/database/PearDatabase.php on line 225
Creating Field generalledgers ... DONE
Module language mapping for General Ledger Accounts ... CHECK

Catchable fatal error: Object of class Vtiger_Module could not be converted to string in /PATH/index.php on line 687