Incorrect syntax near ' + CONVERT(VARCHAR(3),A.CHARACTER_MAXIMUM_LENGTH) + '.

EXEC master..xp_cmdshell
	'bcp "SELECT A.TABLE_NAME	, A.COLUMN_NAME, (SELECT CASE WHEN A.CHARACTER_MAXIMUM_LENGTH IS NOT NULL THEN A.DATA_TYPE + '(' + CONVERT(VARCHAR(3),A.CHARACTER_MAXIMUM_LENGTH) + ')' ELSE	A.DATA_TYPE	END) AS DATA_TYPE, (SELECT TC.CONSTRAINT_TYPE FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS TC INNER JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE KCU ON TC.CONSTRAINT_SCHEMA = KCU.CONSTRAINT_SCHEMA AND TC.CONSTRAINT_NAME = KCU.CONSTRAINT_NAME WHERE TC.TABLE_SCHEMA = 'DBO' AND TC.CONSTRAINT_TYPE IN ('PRIMARY KEY','UNIQUE') AND TC.TABLE_NAME = A.TABLE_NAME AND KCU.COLUMN_NAME = A.COLUMN_NAME) AS KEYS FROM INFORMATION_SCHEMA.COLUMNS A WHERE A.TABLE_NAME	IN (SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME LIKE 'AIP%' AND TABLE_NAME	NOT LIKE '%CHANGES%') ORDER BY TABLE_NAME " QUERYOUT "\\hostname\testing\SCHEMA01.TXT" -Uuser -Ppwd -c -ec:\error.txt'

EXEC master..xp_cmdshell
	'bcp "SELECT A.TABLE_NAME, A.COLUMN_NAME, (SELECT CASE WHEN A.CHARACTER_MAXIMUM_LENGTH IS NOT NULL THEN A.DATA_TYPE + ''('' + CONVERT(VARCHAR(3),A.CHARACTER_MAXIMUM_LENGTH) + '')'' ELSE A.DATA_TYPE END) AS DATA_TYPE, (SELECT TC.CONSTRAINT_TYPE FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS TC INNER JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE	KCU ON TC.CONSTRAINT_SCHEMA = KCU.CONSTRAINT_SCHEMA	AND TC.CONSTRAINT_NAME   = KCU.CONSTRAINT_NAME 	WHERE	 TC.TABLE_SCHEMA		 = ''DBO'' AND TC.CONSTRAINT_TYPE		 IN (''PRIMARY KEY'',''UNIQUE'') AND TC.TABLE_NAME = A.TABLE_NAME AND KCU.COLUMN_NAME = A.COLUMN_NAME AS KEYS FROM INFORMATION_SCHEMA.COLUMNS A WHERE A.TABLE_NAME	IN (SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME LIKE @MASK AND TABLE_NAME NOT LIKE ''%CHANGES%'') ORDER BY TABLE_NAME" QUERYOUT "\\hostname\testing\SCHEMA01.TXT" -Uuser -Ppwd -c -ec:\error.txt'

Msg 102, Level 15, State 1, Line 14
Incorrect syntax near '('.
Msg 102, Level 15, State 1, Line 14
Incorrect syntax near 'DBO'.