When I run examples of documentation "How to do meta-analysis of multiple samples", it errors after "runReportMetaAnalysis(dbPath = databasePath, sampleTablePath = sampleDataFile, outFile = file.path(getwd(), 'myProject.html'));".

The messages were "Error: pandoc version 1.12.3 or higher is required and was not found (see the help page ?rmarkdown::pandoc_available)."

How to solve it?

Thanks!

As it states, Your system is missing pandoc and needs it to be installed. Try following steps at: https://pandoc.org/installing.html The following should return TRUE in an R session:

rmarkdown::pandoc_available()