Unexpected Token: Error occuring inside a stored procedure

Question

I get an unexpected token error when trying to compile below stored procedure. The error occurs on the exec pk_proof.pr_ProofAssets execution statement inside the stored procedure. Any reason why?
CREATE OR REPLACE PROCEDURE MONTHLY_ASSET (ln_business_dt_num IN NUMBER DEFAULT NULL,
                                           missing_tbl_name OUT NOCOPY VARCHAR2)
IS
   ln_business_dt_num NUMBER;
   missing_tbl_name VARCHAR2;
   no_tbl_name_found EXCEPTION;
   bad_date_value EXCEPTION;
   counts_not_matched EXCEPTION;
BEGIN
   IF ln_business_dt_num < 0 THEN
   RAISE bad_date_value;
   ELSE
     Select MAX(business_dt_num) into ln_business_dt_num
     FROM sasor.dp_ca_proof;
   if missing_tbl_name IS NOT NULL then
      raise no_tbl_name_found;
   end if;
   exec pk_proof.pr_ProofAssets('SLH_DST_ASSET', ln_business_dt_num, 'sasor_batch');

Answer 1

EXEC (short for EXECUTE) is an SQL*Plus command. Just remove it.