Thanks for the pointers, and I have located those in the documentation.

However, if I follow that, I get:

HCSLIVE>S Rset=##class(%ResultSet).%New("%SYS.LockQuery:List")

IHCSLIVE>zw

Rset=<OBJECT REFERENCE>[1@%Library.ResultSet]

IHCSLIVE>zw Rset

Rset=<OBJECT REFERENCE>[1@%Library.ResultSet]

IHCSLIVE>D Rset.Execute("")

IHCSLIVE>zw

Rset=<OBJECT REFERENCE>[1@%Library.ResultSet]

IHCSLIVE>zw Rset

Rset=<OBJECT REFERENCE>[1@%Library.ResultSet]

IHCSLIVE>W $O(Rset(""))

IHCSLIVE>

i.e. there doesn't seem to be anything there I can work with.

I suspect that I lack some basic understanding of working with classes...

Thanks,

Adrian

Hi Vitaliy,

Thanks again for your ongoing help with this.

I have now accessed the Lock Table (on the current node, anyway), and identified the PID of the process that has the Lock that I am interested in.

I can see from the help how to use %SYS.ProcessQuery:VariableByPid

However, if I try -

S Vars=##class(%ResultSet).%New("%SYS.ProcessQuery:VariableByPid(6460,zPRS)")

which I know from the System Management Portal exists for that PID, and therefore would have expected to return the value of zPRS from PID 6460, I don't get what the help seems to indicate -

IHCSLIVE>W Vars.zPRS
^
<INVALID OREF>

I guess I'm still missing something fundamental?

Thanks,
Adrian
(btw, this is my first-ever foray into Caché's world of classes and objects - essentially, I am "just" an old MUMPSter)

That does indeed sound promising, but the link to the example code is broken - do you have any other sources for that, please?