You probably want 1 instead of 16 as the last parameter of the query; this parameter means the number of header rows, not of headers.
You also have an extra pair of parentheses in your formula. Otherwise the formula is correct (tested in my spreadsheet), although you could shorten it by replacing
select Col1,Col2,..., Col16 with
=QUERY(IMPORTRANGE("URL","Sheet Name!A2:P1000"),"SELECT * WHERE Col6 CONTAINS 'Abstract & TO'",1)
A possible source of your errors is that your spreadsheets are not connected for the purpose of
In the new version of Google Sheets, spreadsheets must be explicitly granted permission to pull data from other spreadsheets using
IMPORTRANGE. The first time the destination sheet pulls data from a new source sheet, the user will be prompted to grant permission.
Unfortunately, you will not see this prompt if your
IMPORTRANGE command is within a
QUERY; the parse error is thrown instead as there is nothing for
QUERY to parse. To connect the spreadsheet, import something first, e.g.,
You will see
#REF error; hovering over it shows an explanation and "connect" button.