makeShinyFiles error: cannot get a slot ("data") from an object of type "NULL"

[sarah-chapin]

Hello,

I am trying to create a shiny cell app for my single cell data. I am using R 4.1.1. I am running the following code:

library(Seurat)
library(ShinyCell)

seu <- readRDS("seurat_object.rds")
scConf1 = createConfig(seu)
makeShinyFiles(seu, scConf1, shiny.prefix = "sc1",
               shiny.dir = "shinyApp/")

I receive the following error:

Error in slot(obj@assays[[gex.assay[1]]], gex.slot[1]) :
cannot get a slot ("data") from an object of type "NULL"

Do you know what could be causing this error?

[FerrenaAlexander]

I have the same error currently - any fix for this?

EDIT - I was able to fix this, for me this was because I had to adjust the gex.assay argument. Instead of the default "RNA" assay in my Seurat object, I am using data integrated with RISC and I created an assay called "RISC" with a slot/layer called "data". Adjusting gex.assay to RISC fixed the issue for me.