macro error issue

[me55]

okay, so i built this macro a while ago.  it was in a different thread in this forum.  i used it in the past and it worked however i am getting weird, kind of unidentified errors...

%macro VarExist(ds,var);
%local rc dsid result resx;
%let dsid = %sysfunc(open(&ds));
%let resx = %sysfunc(varnum(&dsid,&var));
%let rc = %sysfunc(close(&dsid));

%if &resx > 0 %then %do;
%let result = 1;
%put NOTE: Var &var exists in &ds;

%end;

%else %do;
%let result = 0;
%put NOTE: Var &var not exists in &ds;

data &dsid;
&var='UNK';
set &dsid;
run;

%end;
%mend VarExist;

%VarExist(TABLE_01,FIELD_01);

however, like i said, when i run this i get this error...

93         
94         
98         
99         %macro VarExist(ds,var);
101        %local rc dsid result resx;
102        %let dsid = %sysfunc(open(&ds));
103        %let resx = %sysfunc(varnum(&dsid,&var));
104        %let rc = %sysfunc(close(&dsid));
105        
106        %if &resx > 0 %then %do;
107        %let result = 1;
108        %put NOTE: Var &var exists in &ds;
109        
110        %end;
111        
112        %else %do;
113        %let result = 0;
114        %put NOTE: Var &var not exists in &ds;
115        
116        data &dsid;
117        set &dsid;
118        &var='UNK';
119        run;
120        
121        %end;
122        %mend VarExist;
123        
124        %VarExist(TABLE_01,FIELD_01);
MLOGIC(VAREXIST):  Beginning execution.
MLOGIC(VAREXIST):  Parameter DS has value TABLE_01
MLOGIC(VAREXIST):  Parameter VAR has value FIELD_01
MLOGIC(VAREXIST):  %LOCAL  RC DSID RESULT RESX
MLOGIC(VAREXIST):  %LET (variable name is DSID)
SYMBOLGEN:  Macro variable DS resolves to TABLE_01
MLOGIC(VAREXIST):  %LET (variable name is RESX)
SYMBOLGEN:  Macro variable DSID resolves to 1
SYMBOLGEN:  Macro variable VAR resolves to FIELD_01
MLOGIC(VAREXIST):  %LET (variable name is RC)
SYMBOLGEN:  Macro variable DSID resolves to 1
SYMBOLGEN:  Macro variable RESX resolves to 0
MLOGIC(VAREXIST):  %IF condition &resx > 0 is FALSE
MLOGIC(VAREXIST):  %LET (variable name is RESULT)
MLOGIC(VAREXIST):  %PUT NOTE: Var &var not exists in &ds
SYMBOLGEN:  Macro variable VAR resolves to FIELD_01
SYMBOLGEN:  Macro variable DS resolves to TABLE_01
NOTE: Var FIELD_01 not exists in TABLE_01
SYMBOLGEN:  Macro variable DSID resolves to 1
NOTE: Line generated by the macro variable "DSID".
5                                                          The SAS System                       Friday, January 29, 2021 03:01:00 PM

124         1
            _
            22
            200
MPRINT(VAREXIST):   data 1;
SYMBOLGEN:  Macro variable DSID resolves to 1
ERROR 22-322: Syntax error, expecting one of the following: a name, a quoted string, /, ;, _DATA_, _LAST_, _NULL_.  

ERROR 200-322: The symbol is not recognized and will be ignored.

NOTE: Line generated by the macro variable "DSID".
124         1
            _
            22
            200
MPRINT(VAREXIST):   set 1;
SYMBOLGEN:  Macro variable VAR resolves to TBL_SRC
MPRINT(VAREXIST):   FIELD_01='UNK';
MPRINT(VAREXIST):   run;

ERROR 22-322: Syntax error, expecting one of the following: a name, a quoted string, ;, CUROBS, END, INDSNAME, KEY, KEYRESET, KEYS, 
              NOBS, OPEN, POINT, _DATA_, _LAST_, _NULL_.  

ERROR 200-322: The symbol is not recognized and will be ignored.

NOTE: The SAS System stopped processing this step because of errors.
WARNING: The data set WORK.DATA1 may be incomplete.  When this step was stopped there were 0 observations and 19 variables.
NOTE: DATA statement used (Total process time):
      real time           0.01 seconds
      cpu time            0.00 seconds
      

MLOGIC(VAREXIST):  Ending execution.

also, should i insert a line to close the table or does it just do that because i have the rc line in there?

[Kurt_Bremser · Accepted solution]

Here you should use the dataset name, not the handle returned by the OPEN function:

data &dsid;
set &dsid;

should be

data &ds;
set &ds;

[LeonidBatkhan]

Hi me55,

&dsid is a number, you cannot have data set name as a number.

Instead of

data &dsid;
   set &dsid;
   &var='UNK';
run;

you probably should have

data &ds;
   set &ds;
   &var='UNK';
run;

Hope this helps.

[ballardw]

Remember that the OPEN function

The OPEN function opens a SAS data set, DATA step, or a SAS SQL view and returns a unique numeric data set identifier, which is used in most other data set access functions. OPEN returns 0 if the data set could not be opened.

Data set names and variable names cannot be all digits.

So

data &dsid;

is not legal when creating the value for &dsid with the Open function.