SqlClient.SqlException (0x80131904) The identifier that starts with

I am using stored procedure as below anyhow for some files i am retreiving following error. What could be the reason?:

 System.Data.SqlClient.SqlException (0x80131904): The identifier that starts with 'D:\DISKSEC\TETRAIBMSolution\TETRA\Data\IDJSKDOSD\Parsed\IOPDCVv3995ReportErgfdgfgdfIOPShun_e6c5b926-fb91-484e-bfe0-9c13a96f' is too long. Maximum length is 128.

Stored procedure i am using:

 ALTER PROCEDURE [dbo].[BulkInsertDelimeted] 
                @InputFileName Varchar(700), 
                @TableName Varchar(200) 
        AS 
        BEGIN  
        declare @query varchar(6000) 
          set @Query ='BULK INSERT "' + @TableName + '" FROM "'+ @InputFileName+'" 
                WITH ( DATAFILETYPE =  ''char'', FIELDTERMINATOR = '','' , ROWTERMINATOR = ''\n'')'; 
        print @query 
        exec (@query) 
        END