Can't compile any Niagara Dynamic Input scripts

Development Asset Creation FX
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1

I’m seeing a weird issue with Niagara: I can’t compile any dynamic input scripts, even the built-in ones. The error I get looks like this:

LogNiagara: Error: Error compiling input for param map get node. - Node: Map Get - Callstack: MyEmptyModule
Cannot find parameter map for input! - Node: Map Get - Callstack: MyEmptyModule
Error compiling Pin - Node: Output Dynamic Input - Callstack: MyEmptyModule
The HLSL Translator failed to generate HLSL!

If I do this on an existing one, like Multiply Vector By Float, the log is near-identical:

LogNiagara: Error: Error compiling input for param map get node. - Node: Map Get - Callstack: Multiply_VectorByFloat
Cannot find parameter map for input! - Node: Map Get - Callstack: Multiply_VectorByFloat
Error compiling input on Multiply node. - Node: Multiply - Callstack: Multiply_VectorByFloat
Error compiling input on Multiply node. - Node: Multiply - Callstack: Multiply_VectorByFloat
The HLSL Translator failed to generate HLSL!

This doesn’t happen for Modules or Functions, only Dynamic Inputs. Is there something I’m missing here? I first noticed this in 4.20.1 and it’s still happening now that I’ve updated to 4.20.2.

2

It’s a known issue. Basically the standalone compiler doesn’t handle dynamic inputs very well because it doesn’t end with a parameter map output.

3

Any way around this issue at the current moment? Or will we simply have to wait for a future update to add our own input scripts?

4

Don’t worry about it not compiling standalone. Just build it and diagnose the errors as used inline. They work perfectly fine when used (i.e we use them all over the place).