select
REPLACE(child.type + child.name, ' ', '_' )from sys.sql_dependencies
inner join sys.objects child
on child.object_id = sys.sql_dependencies.object_id
Msg 446, Level 16, State 9, Line 1
Cannot resolve collation conflict for replace operation.
What does this error message mean and how can it be resolved
Database is Latin1_General_CI_AI
sys.objects is Latin1_General_CI_AI
sys.sql_dependencies is Latin1_General_CI_AI
child.name is nvarchar(128)
child.type is char(2)
Remove the child.type + and the query works.
Change the query to this and it fails:
select child.type + child.name
from sys.sql_dependencies
inner join sys.objects child
on child.object_id = sys.sql_dependencies.object_id
Msg 451, Level 16, State 1, Line 1
Cannot resolve collation conflict for column 1 in SELECT statement.

SQL 2005 collation conflict for replace operation
Nathan Franklin
The error message is due to the fact that collation of name is SQL_Latin1_General_CP1_CI_AS and type is Latin1_General_CI_AS_KS_WS. So you need to use COLLATE clause to coerce say name column like:
select
child.type + child.name collate Latin1_General_CI_AS_KS_WSfrom
sys.sql_dependenciesinner
join sys.objects childon
child.object_id = sys.sql_dependencies.object_id