LLD - how reference dynamic key in item prototype

[ramoneastral]

hi all,

maybe i am just mixing up escape characters et al. but

i have ldd with host prototype and that works fine .
with a second macro in host prototype i am able to separate these hosts . namely fileserver - root folder - subfolders ...

now i created an item prototype to do aggregation of these subfolders - works also fine .

now i want to do some calculations on this aggregated item . how do i put in the aggregate item into the calc item ?

aggregate item : grpsum["tech/AZUREFILES/{#SHAREPARTITION}","allsum",last]
calculate item : forecast("what-goes-here ????",{$6MGROWTHHIST2},,180d)

maybe: forecast("grpsum["tech/AZUREFILES/{#SHAREPARTITION}","allsum",last]",{$6MGROWTHHIST2},,180d) ???
this does not work for me ,
what am i missing ?

[steeladept]

This is above me, so I may be way off here; but it looks to me like the forecast you are trying to setup has 3 parameters but it wants 4. What should go between the 2 commas? Or should one be removed?

Also, and perhaps more likely to your issue (now that I look closer at it), you are using double quotes everywhere, which means in the solution you think should work, the first field is <grpsum[> not <grpsum["tech/AZUREFILES/{#SHAREPARTITION}","allsum",last]>. Perhaps try enclosing it in single quotes instead of double-quotes. Or if you can assign it as a variable and use the variable. In some way, you need to differentiate the grouping so it knows the whole thing is the first parameter and not break it up - especially since it contains commas too.

[ramoneastral]

my fault ... RTFM calculated items : User macros in the formula will be expanded if used to reference a function parameter or a constant. User macros will NOT be expanded if referencing a function, host name, >>item key<<, item key parameter or operator. i created a calculated item and disabled it, when needed i just clone the item and change the needed itemkey - escaping with backslash...
thanks for listening