MySQL ERROR:

Error Number: 1

Description: Can't create/write to file '/tmp/#sql_77ca_0.MYI' (Errcode: 2)

Query: SELECT DISTINCT(exp_categories.cat_id), exp_categories.parent_id, exp_categories.cat_name, exp_categories.cat_image, exp_categories.cat_description FROM exp_categories WHERE group_id ='2' ORDER BY parent_id, cat_order