Tab Completion Error

ROOT
1

ROOT Version: 6.18
Platform: win10

20200305_095408
20200305_095408970×247 31 KB

Whenever i try to use the tab completion after an arrow pointer as seen in the first line in the attached picture, this happens…
Does anyone know why?

Thank you.

2

That might be either connected to the ROOT version or to the platform (win10). Can you, by any chance, try a more recent version ? @bellenot will be able to tell you if it is a windows issue or not.
I tried on my MacOS platform with the latest ROOT, all is fine.

3

I’ve tried to install the latest version 6.20 but first upon calling root in cmd, a list of problems appeared, i think they’re related to the compatibility of the windows sdk version i don’t really know …
Is there any suggestion for what should i do?

4

How did you start ROOT?

5

1-open cmd
2-go to the dir in which i’m working
3-type root

That’s it.

6

I can’t reproduce the error… I just tried with ROOT v6.18.00, and here is what I get:

root [0] g->SetM
variable "g" not defined.

variable "g->SetM" not defined.
root [0] g->SetM
7

I have defined g before as: g= new TGraph();
I also tried other definitions as TF1() too and TCanvas(), i’m still a root beginner… that why i’m using Tab completions a lot.

8

OK, thanks, now I can reproduce the error, but not always… Apparently, the issue seems to be fixed, at least in the master

9

Could you try with ROOT v6.18.04? It seems to be working:

   ------------------------------------------------------------
  | Welcome to ROOT 6.18/04                  https://root.cern |
  |                               (c) 1995-2019, The ROOT Team |
  | Built for win32 on Sep 11 2019, 15:38:23                   |
  | From tags/v6-18-04@v6-18-04                                |
  | Try '.help', '.demo', '.license', '.credits', '.quit'/'.q' |
   ------------------------------------------------------------

root [0] g = new TGraph();
root [1] g->SetM
SetMarkerAttributes
SetMarkerColor
SetMarkerColorAlpha
SetMarkerSize
SetMarkerStyle
SetMaximum
SetMinimum
root [1] g->SetM
10

Same Problem,
The tab completion problem only happens after the arrow pointer,
But i did notice that sometimes(but rarely) it works fine…

11

OK, and apparently the version 6.20 has the same issue… So sorry, there is not much I can do for the time being…

12

Well then thank you for your help😊

1 Like
13

You’re very welcome! :slight_smile:

14

Hello,
I found a way to use tab completion without getting this error, say i want to know the tab completion of g->Set… , and assuming g is defined as:
g = new TGraph();

I simply type TGraph::Set and now if i press tab it shows me what i want without an error screen.

I think it’s a good temporary solution pending an update to fix it.
What do you think?

15

Well, why not, if it works that way. Note that I’m currently trying to find a fix. And you can also use:

root [0] .help TGraph
16

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