Network meta-analysis_Problems with Contribution Plot

[Andrey Potapov]

Hello,

can you help me with one point of network meta-analysis - generating contribution plot using "netweight" command?

When I conduct

netweight _y _stderr _t1 _t2,asp(0.7)

with my data I got r(504):


[P] error . . . . . . . . . . . . . . . . . . . . . . . . Return code 504
matrix has missing values;
This return code is now infrequently used because, beginning
with version 8, Stata now permits missing values in matrices.

Could you please advice what I have wrong in my data (attached) or code (below)?

Code:

network setup mean sd n, study(id) trt(t) numcodes
network convert pairs
gen invvarES=1/( _stderr^2)
networkplot _t1 _t2, edgew(invvarES) edgesc(1.2) asp(0.8)
networkplot _t1 _t2, edgew(invvarES) edgecol(by blinding mean) edgesc(1.2) asp(0.8)
netweight _y _stderr _t1 _t2,asp(0.7)

[Jan Valentin]

Install the package metan:

. ssc install metan