what is wrong with this code

[desireatem]

data simu;
set simulate1;
a=beta*x1 + betax3*x3;
b=exp(a);
Time=SURVIVAL1**b;
run;

[DanZ]

Hard to tell without a log, an input, an output, or a description of the problem...

Is the variable "a" null?

If so, use a=sum(beta*x1,betax3*x3);

[desireatem]

This is the log file:
1524 b=exp(a);
-
22
ERROR 22-322: Syntax error, expecting one of the following: !, !!, &, *, **, +, -, /, ;, <,
<=, <>, =, >, ><, >=, AND, EQ, GE, GT, IN, LE, LT, MAX, MIN, NE, NG, NL, NOTIN,
OR, ^=, |, ||, ~=.

WARNING: The data set WORK.SIMU may be incomplete. When this step was stopped there were 0
observations and 16 variables.
WARNING: Data set WORK.SIMU was not replaced because this step was stopped.

[desireatem]

This is the log file;

1524 b=exp(a);
-
22
ERROR 22-322: Syntax error, expecting one of the following: !, !!, &, *, **, +, -, /, ;, <,
<=, <>, =, >, ><, >=, AND, EQ, GE, GT, IN, LE, LT, MAX, MIN, NE, NG, NL, NOTIN,
OR, ^=, |, ||, ~=.

WARNING: The data set WORK.SIMU may be incomplete. When this step was stopped there were 0
observations and 16 variables.
WARNING: Data set WORK.SIMU was not replaced because this step was stopped.

[Astounding]

The line before that calculates "a" ... is it missing a semicolon?

[Reeza · Accepted solution]

Post the code and full log please