Help: Error message "length of NULL cannot be changed"

Usage
#1

When trying to generate colors or change the weight of edges when using igraph I’m generating the error “length of NULL cannot be changed.”

Specifically when running these codes:

    colrs <- c("skyblue", "orchid2", "peachpuff")
    V(net)$color <- colrs[V(net)$source]

I get:

Warning message:
In length(vattrs[[name]]) <- vc : length of NULL cannot be changed

When I run the code:

E(net)$width <- E(net)$weight/6

I get the same error. Has anyone gotten similar errors and know what to do with them in this context? Thank you

#2

I am unable reproduce your problem. Please post a minimal working example of your problem. Perhaps it would then be possible to identify the problem.