Originally posted by: Zacharie_ALES

Hello,

To avoid memory leaks, I only use one cplex object that I reinitialize via the clearModel() and clearCallback() methods each time I want to solve a new problem.

However the parameters of the cplex object do not seem to be reinitialized. Do you know if it's possible to set all the parameters to their default value ?

I tried to use IloCplex.getParameterSet(), but it does not seem to work. Indeed, the following code throw an exception at the third line : "Parameter not  in ParameterSet" :      

IloCplex c = new IloCplex();
ParameterSet s = c.getParameterSet();
System.out.println(s.getParam(IloCplex.DoubleParam.TiLim));

Thanks in advance.

This is the Java API? IloCplex.setDefaults() should reset all parameters to default values. It's not necessary, though. Parameters are essentially fields of an IloCplex instance, so when you create c (line 1 of your code) it is "born" with all default values. The reason for the exception is that (AFAIK) the ParameterSet s only contains non-default parameter values; so in this case it is empty, and thus getParam() in line 3 does not find TiLim (and will not find any other parameter). Invoking getParam() on c, rather than on s, should cough up a value for the time limit, and it should be the default value.

Paul

Originally posted by: Zacharie_ALES

Yes this is the java API. Indeed IloCplex.setDefaults() works just fine. 

I thought the IloCplex.getParameterSet() function was returning all the parameters not only the modified ones. 

Thanks.