In class A
..
private String pPackageId;
public void setPPackageId(String ppkgId) {
this.pPackageId = ppkgId;
}

public String getPPackageId() {
return pPackageId;
}
...

in the hbm.xml file :
<property name="pPackageId" access="field">
<column name="ppackageid"/>
</property>


but I caught the following exception:
PropertyNotFoundException: Could not find a getter for pActivityId in class

why?

Probably something messed up with the property called "pActivityId"? It is nowhere present in the code you posted.

I am sorry for my mistake. There are serveral properties in the class ,I only show one of them

If you are writing these classes from scratch, then use safer Javabeans notation where you have at least 2 characters in each "word". so "pPackageId" is not ideal, but "ppPackageId" is better. We use Jakarta beanutils which uses the Sun property API and someitmes it has problems in this area... Chris