Global temporary tables in SQL Server

Question

I have a ##table which can be accessed across all the sessions but sometimes I am getting error

There is already an object named \'##table\' in the

Answer 1

So the WHY part has been answered and here is how to resolve it:

Do a check to see if the temp table exists before creating it:

    if object_id('tempdb..##table') is null begin
        --create table ##table...
    end

I found a pretty interesting post about how to check the existence of a temp table from Googling http://sqlservercodebook.blogspot.com/2008/03/check-if-temporary-table-exists.html