Hello, I am a programmer Spanish and I have a problem in the grid.base.js.
I'm making an application based on the jquery tabs in one of the tabs I have a jqgrid whose data are loaded from a javascript array. By accessing the tab that contains the grid the first time this is successfully loaded, but when I change the tab, and go back to the grid tab sometimes returns me an error such as t.p is undefined in the grid.base.js (line 1896) . This error prevents the loading of the grid, but makes an exception firebug show.

What could be the problem?
Thank you very much for the help.