<![CDATA[Error - Unable to render template. spawn UNKNOWN]]>Hey hello,
@jan_blaha

We get this error while rendering the report: "Unable to render template. spawn UNKNOWN",
I don't understand how to resolve it, can you suggest some solutions? on this.

This are console logs:

2023-06-07T14:29:26.770Z - info: Render request 1 queued for execution and waiting for available worker rootId=rfgnjez915tb1a2, id=rfgnjez915tb1a2
2023-06-07T14:29:26.855Z - info: Starting rendering request 1 rootId=rfgnjez915tb1a2, id=rfgnjez915tb1a2
2023-06-07T14:29:26.856Z - info: Rendering template { name: returnTemplate, recipe: chrome-pdf, engine: handlebars, preview: false } rootId=rfgnjez915tb1a2, id=rfgnjez915tb1a2
2023-06-07T14:29:26.857Z - debug: Inline data specified. rootId=rfgnjez915tb1a2, id=rfgnjez915tb1a2
2023-06-07T14:29:26.857Z - debug: Base url not specified, skipping its injection. rootId=rfgnjez915tb1a2, id=rfgnjez915tb1a2
2023-06-07T14:29:26.936Z - debug: Replaced assets ["returnTemplate-style.css"] rootId=rfgnjez915tb1a2, id=rfgnjez915tb1a2
2023-06-07T14:29:26.936Z - debug: Rendering engine handlebars rootId=rfgnjez915tb1a2, id=rfgnjez915tb1a2
2023-06-07T14:29:28.624Z - debug: Executing recipe chrome-pdf rootId=rfgnjez915tb1a2, id=rfgnjez915tb1a2
2023-06-07T14:29:28.668Z - error: Error when processing render request 1
(because) spawn UNKNOWN
Error: spawn UNKNOWN
at ChildProcess.spawn (node:internal/child_process:412:11)
at Object.spawn (node:child_process:698:9)
at Object.spawn (pkg/prelude/bootstrap.js:1963:27)
at BrowserRunner.start (C:\snapshot\jsreport\node_modules\puppeteer\lib\cjs\puppeteer\node\BrowserRunner.js:119:34)
at ChromeLauncher.launch (C:\snapshot\jsreport\node_modules\puppeteer\lib\cjs\puppeteer\node\ChromeLauncher.js:76:16)
at async createBrowser (C:\snapshot\jsreport\packages\jsreport-chrome-pdf\lib\chromePoolStrategy.js:98:26)
at async allocateBrowser (C:\snapshot\jsreport\packages\jsreport-chrome-pdf\lib\chromePoolStrategy.js:113:5)
at async getBrowser (C:\snapshot\jsreport\packages\jsreport-chrome-pdf\lib\chromePoolStrategy.js:23:30)
at async C:\snapshot\jsreport\packages\jsreport-chrome-pdf\lib\conversion.js:11:19
at async execute (C:\snapshot\jsreport\packages\jsreport-chrome-pdf\lib\chromePoolStrategy.js:20:22) rootId=rfgnjez915tb1a2, id=rfgnjez915tb1a2
2023-06-07T14:29:28.669Z - error: Rendering request 1 finished with error in 1903 ms rootId=rfgnjez915tb1a2, id=rfgnjez915tb1a2
2023-06-07T14:29:28.677Z - error: Error during processing request at http://localhost:5488/api/report

]]>https://forum.jsreport.net/topic/2820/error-unable-to-render-template-spawn-unknownRSS for NodeWed, 16 Sep 2026 15:54:46 GMTWed, 07 Jun 2023 14:39:23 GMT60<![CDATA[Reply to Error - Unable to render template. spawn UNKNOWN on Invalid Date]]>Hey hello,
@jan_blaha

We get this error while rendering the report: "Unable to render template. spawn UNKNOWN",
I don't understand how to resolve it, can you suggest some solutions? on this.

This are console logs:

2023-06-07T14:29:26.770Z - info: Render request 1 queued for execution and waiting for available worker rootId=rfgnjez915tb1a2, id=rfgnjez915tb1a2
2023-06-07T14:29:26.855Z - info: Starting rendering request 1 rootId=rfgnjez915tb1a2, id=rfgnjez915tb1a2
2023-06-07T14:29:26.856Z - info: Rendering template { name: returnTemplate, recipe: chrome-pdf, engine: handlebars, preview: false } rootId=rfgnjez915tb1a2, id=rfgnjez915tb1a2
2023-06-07T14:29:26.857Z - debug: Inline data specified. rootId=rfgnjez915tb1a2, id=rfgnjez915tb1a2
2023-06-07T14:29:26.857Z - debug: Base url not specified, skipping its injection. rootId=rfgnjez915tb1a2, id=rfgnjez915tb1a2
2023-06-07T14:29:26.936Z - debug: Replaced assets ["returnTemplate-style.css"] rootId=rfgnjez915tb1a2, id=rfgnjez915tb1a2
2023-06-07T14:29:26.936Z - debug: Rendering engine handlebars rootId=rfgnjez915tb1a2, id=rfgnjez915tb1a2
2023-06-07T14:29:28.624Z - debug: Executing recipe chrome-pdf rootId=rfgnjez915tb1a2, id=rfgnjez915tb1a2
2023-06-07T14:29:28.668Z - error: Error when processing render request 1
(because) spawn UNKNOWN
Error: spawn UNKNOWN
at ChildProcess.spawn (node:internal/child_process:412:11)
at Object.spawn (node:child_process:698:9)
at Object.spawn (pkg/prelude/bootstrap.js:1963:27)
at BrowserRunner.start (C:\snapshot\jsreport\node_modules\puppeteer\lib\cjs\puppeteer\node\BrowserRunner.js:119:34)
at ChromeLauncher.launch (C:\snapshot\jsreport\node_modules\puppeteer\lib\cjs\puppeteer\node\ChromeLauncher.js:76:16)
at async createBrowser (C:\snapshot\jsreport\packages\jsreport-chrome-pdf\lib\chromePoolStrategy.js:98:26)
at async allocateBrowser (C:\snapshot\jsreport\packages\jsreport-chrome-pdf\lib\chromePoolStrategy.js:113:5)
at async getBrowser (C:\snapshot\jsreport\packages\jsreport-chrome-pdf\lib\chromePoolStrategy.js:23:30)
at async C:\snapshot\jsreport\packages\jsreport-chrome-pdf\lib\conversion.js:11:19
at async execute (C:\snapshot\jsreport\packages\jsreport-chrome-pdf\lib\chromePoolStrategy.js:20:22) rootId=rfgnjez915tb1a2, id=rfgnjez915tb1a2
2023-06-07T14:29:28.669Z - error: Rendering request 1 finished with error in 1903 ms rootId=rfgnjez915tb1a2, id=rfgnjez915tb1a2
2023-06-07T14:29:28.677Z - error: Error during processing request at http://localhost:5488/api/report

]]>https://forum.jsreport.net/post/12192https://forum.jsreport.net/post/12192Invalid Date<![CDATA[Reply to Error - Unable to render template. spawn UNKNOWN on Invalid Date]]>It seems you use jsreport.exe binary and it can't run chrome.exe for some unknown reason.
The chrome.exe is extracted to the user temp during the first run.

Please try to remove the [user temp folder]/jsreport and try it again.
Typically its here c:\Users\[user]\AppData\Local\Temp\jsreport\

]]>https://forum.jsreport.net/post/12195https://forum.jsreport.net/post/12195Invalid Date