Out of memory (allocated 27000832)

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Create an Invoice
2. Press Email to Client
3. Fatal Error message came up
Fatal error: Out of memory (allocated 27000832) (tried to allocate 1245184 
bytes) in 
invoicing/wp-content/plugins/web-invoice/lib/dompdf/lib/class.pdf.php(2219) : 
eval()'d code on line 5914

What is the expected output? What do you see instead?

What version of the product are you using? On what operating system?
Latest version

Please provide any additional information below.

Simply created the invoice, went to email to client then above fatal error 
message was produced

Original issue reported on code.google.com by i...@dogwalkersouthampton.co.uk on 9 Jan 2012 at 1:27

[GoogleCodeExporter]

this has nothing to do with the plugin and everything with your own server 
setup.

try adding this line to your wp-config.php file:

define('WP_MEMORY_LIMIT', '128M');

Original comment by piethf...@gmail.com on 29 Mar 2012 at 6:46