* Setting a new different engine with different stack, even same engine where the
* stack has been dynamically changed, could cause a bad behaviour depending on the
* changes: in general, if the dictionary grows, nothing bad will happen, but if
* you remove or modified some elements which were processed with a certain format,
* will be interpreted as 'unknown' with the new dictionary, and then some problems
* may occur. If you add elements (vendors, avps, messages) is not a problem.
* Setting a new different engine with different stack, even same engine where the
* stack has been dynamically changed, could cause a bad behaviour depending on the
* changes: in general, if the dictionary grows, nothing bad will happen, but if
* you remove or modified some elements which were processed with a certain format,
* will be interpreted as 'unknown' with the new dictionary, and then some problems
* may occur. If you add elements (vendors, avps, messages) is not a problem.