Shiny UI throws "object 'GCAM_version' not found" when launched from generate_report()

[choiHenry]

Hello BC3 gcamreport developers,

I was really impressed by your recent presentation — thank you for sharing your work. I’ve started using gcamreport and found it very helpful, but I encountered an issue when launching the Shiny UI.

Description

When running generate_report(..., launch_ui = TRUE), the Shiny app fails to launch and throws:

This happens even though GCAM_version is passed as an argument.

---

Steps to Reproduce:

Run generate_report() with valid arguments as in the tutorial

## -- store the database path, name, and scenarios in a variable.
dbpath <- "examples"
dbname <- "database_basexdb_ref"
scen <- "Reference"
GCAMv <- "v7.1"

## -- choose a project name
prjname <- "example1_v7.1.dat"

## -- generate the reporting dataset until 2050 for EU-12 and EU-15 for all the 
## -- Agricultural variables, save the output in .RData, .csv and .xlsx format, 
## -- and lunch the user interface
generate_report(db_path = dbpath, db_name = dbname, scenarios = scen, 
                prj_name = prjname, final_year = 2050, GCAM_version = GCAMv,
                desired_regions = [c](https://rdrr.io/r/base/c.html)('EU-12', 'EU-15'), 
                desired_variables = [c](https://rdrr.io/r/base/c.html)('Agricultural*'), 
                save_output = TRUE, launch_ui = TRUE)

---

System

• OS: Ubuntu via WSL2
• R: 4.3.2
• GCAM version: v7.1

---

Workaround

Define GCAM_version globally before calling generate_report():

GCAM_version <- "v7.1"