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OpenVPMS is developed with the help of various tools including the Java profiler 
Thanks to our sponsors:
OpenVPMS is developed with the help of various tools including the Java profiler
Re: adjust opening balance
In theory you just do an opening balance - whatever it was before you added an invoice.
Read more
https://openvpms.org/documentation/csh/2.1/customer/account/edit/initial...
https://openvpms.org/documentation/csh/2.1/customer/account/edit/creditA...