Error: Missing helper: "xlsxTableSheet"
at Object.<anonymous> (C:\Projects2\cmd_api\node_modules\handlebars\dist\cjs\handlebars\helpers\helper-missing.js:19:13)
at Object.wrapper (C:\Projects2\cmd_api\node_modules\handlebars\dist\cjs\handlebars\internal\wrapHelper.js:15:19)
at eval (eval at compile (C:\Projects2\cmd_api\node_modules@jsreport\jsreport-handlebars\lib\handlebarsEngine.js:35:30), <anonymous>:11:133)
at Object.main (eval at compile (C:\Projects2\cmd_api\node_modules@jsreport\jsreport-handlebars\lib\handlebarsEngine.js:35:30), <anonymous>:19:4)
at C:\Projects2\cmd_api\node_modules@jsreport\jsreport-handlebars\async-helpers\index.js:61:22
at ret (C:\Projects2\cmd_api\node_modules\handlebars\dist\cjs\handlebars\runtime.js:212:12)
at Object.execute (C:\Projects2\cmd_api\node_modules@jsreport\jsreport-handlebars\lib\handlebarsEngine.js:80:14)
at Object.execute (C:\Projects2\cmd_api\node_modules@jsreport\jsreport-handlebars\lib\worker.js:27:43)
at executionFn (C:\Projects2\cmd_api\node_modules@jsreport\jsreport-core\lib\worker\render\executeEngine.js:216:40)
at sandbox.js:16:18

I've looked around on the forums/github/stackoverflow and have run out of potential solutions, but have garnered a better understanding of what may be causing the issue. Before rendering the template object with jsreport, it looks like this:

{
engine: 'handlebars',
recipe: 'xlsx',
content: '{{!-- Resize and fill table --}}\r\n' +
'{{xlsxTableSheet "Data" headers rows}}\r\n' +
'{{xlsxWrapText}}\r\n' +
'\r\n' +
'{{!-- Enforces recalculation of formula cells when file is opened --}}\r\n' +
'{{xlsxCalcOnLoad 1}}\r\n' +
'\r\n' +
'{{!-- Generates the spreadsheet --}}\r\n' +
'{{{xlsxPrint}}}\r\n',
helpers: ';(function (global) {\r\n' +
'\r\n' +
" const path = require('path');\r\n" +
' require(path.resolve(__rootDirectory, "reports/helpers/xlsx"))(global);\r\n' +
' require(path.resolve(__rootDirectory, "reports/helpers/math"))(global);\r\n' +
' require(path.resolve(__rootDirectory, "reports/helpers/util"))(global);\r\n' +
'\r\n' +
' // additional functions\r\n' +
'\r\n' +
' Object.assign(global, {\r\n' +
' // additional functions\r\n' +
' });\r\n' +
' \r\n' +
'})(this);',
xlsx: { templateAsset: [Object] }
}

When I tried hard coding the helpers instead of requiring them as I am above it worked correctly, leading me to believe that the render function is having trouble parsing the 'require' statements within the imported file. The helper files listed have a rough structure as follows:

module.exports = function (global) {
....functions listed here

Object.assign(global, {
functions aliased here
}

This worked previously with v2, I have already verified that handlebars versions are synced correctly between packages, I am using the newer packages with @jsreport/jsreport-core, and I've run out of ideas on how to move forward with this issue. Thanks for any help.

it is not documented but if you want to do the same helpers registration (like v2) you can do something like this:

__topLevelFunctions.testing = function () {
    return 'Hola'
}

https://playground.jsreport.net/w/anon/QFCBJjJH

for your code i think you can change this last part to:

// OLD: })(this)
})(__topLevelFunctions) // NEW

the recommended approach is still to do it with assets but if you don't want to do big changes to your app then use what i described above