Cheshire Cat Computing

I have several user defined graphs that work fine under v2.11, but display an error under v2.14. I'm using rrdtool v1.0.38.

Following is one of the graphs:

routers.cgi*Graph[jaxwanrt1_170.203.208.38]: bb-in noo
routers.cgi*Graph[jaxwanrt1_170.203.208.46]: bb-in
routers.cgi*Graph[jaxwanrt1_170.203.71.1]: bb-in
routers.cgi*Graph[jaxwanrt1_170.203.71.5]: bb-in
routers.cgi*Desc[_bb-in]: Business Backbone Inbound Traffic Total
routers.cgi*ShortDesc[_bb-in]: Business BBone In
routers.cgi*GraphStyle[_bb-in]: stack
routers.cgi*Icon[_bb-in]: traffic-sm.gif

The error that I get is:

RRD Error: invalid rpn expression '0,fin1,DUP,UN,EXC,PREV(fin1),DUP,UN,EXC,0,EXC,IF,EXC,IF,+,fin2,DUP,UN,EXC,PREV(fin2),DUP,UN,EXC,0,EXC,IF,EXC,IF,+,fin3,DUP,UN,EXC,PREV(fin3),DUP,UN,EXC,0,EXC,IF,EXC,IF,+,fin4,DUP,UN,EXC,PREV(fin4),DUP,UN,EXC,0,EXC,IF,EXC,IF,+'

You can visit the configuration verification page here.

There is additional information after that (the rrd parameter info). It is quite lengthy and I will post it if anyone thinks it will be helpful.

Thanks

Mike

Checking the RRDTool CHANGES file, it appears that PREV was not available before v1.0.39. You have 1.0.38, I am testing with 1.0.46.

V2.14 has changed the method of calculating the userdefined value totals, because on many machines the data collection was out of synch and this resulted in incorrect or zero 'last' values. To fix this required the use of the PREV() function in RRDTool. However, your version is too old to support it...

What I will do is to add a check for RRDTool version, and use the old code if you have <=1.0.38. I can send you the patched version, or alternatively upgrade your RRDTool (this is the recommended solution, since Tobi has added a few bugfixes since that point).

I will also add 'requires 1.0.39 or later' to the documentation. Sorry for not making it clear beforehand,

Steve

Thanks for the info, I thought it might be something like that but wanted to check first. I'll upgrade my RRDTool to solve the problem.