A problem has been encountered on the server

Error: exception.server.EMTOOL.RUNTIMEERROR,1012

13499   *------------------------------------------------------------*;
13500   * IGN: Scoring DATA data;
13501   *------------------------------------------------------------*;
13502   data EMWS.IGN_TRAIN
13503   / view=EMWS.IGN_TRAIN
13504   ;
13505   set EMWS.EMCODE_TRAIN
13506   ;
13507   %inc emflow;
13597  +variable_name=2 then do

                       ---- --
                        388  202
13602  +variable_name=4 then do;
                         ---- --
                         388  202
13605  +end;
         ---
        161
13606  +else
        ----
        160
13607  +variable_name=7 then do;
                         ---- --
                         388  202
13610  +end;
        ---
        161
13611  +else
        ----
        160
13612  +variable_name=9 then do;
                         ---- --
                         388  202
13615  +end;
        ---
        161
13616  +else
        ----
        160
13617  +variable_name=20 then do;
                          ---- --
                          388  202
13620  +end;
        ---
        161
13621  +end;
        ---
        161
ERROR 388-185: Expecting an arithmetic operator.
ERROR 202-322: The option or parameter is not recognized and will 
    be ignored.

ERROR 161-185: No matching DO/SELECT statement.

ERROR 160-185: No matching IF-THEN clause.