Assume an expression with the following type, where a search expression inside a map() function call is done:
map("[COLUMN_NAME].$esc($csearch([COLUMN_NAME],"datatype:real and not name:MY COLUMN NAME"))",",")
Notice that the column in the search part of the call to map() has spaces in its name. This column name will be treated as separate search terms when Spotfire processes the expression. The expression will therefore be considered invalid, even though this is a legal operation.