Failed to open project. Check it is a valid Construct 2 single-file (.capx) project. NO 3RD PARTY

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  • I am not able to open one of my old C2 projects in C3 even though it will open in the last version of C2. The project is not using any 3rd party plugins or behaviors.

    From the project file:


    <plugin author="Scirra" id="Function" version="1">Function</plugin>

    <plugin author="Scirra" id="Sprite" version="1">Sprite</plugin>

    <plugin author="Scirra" id="Text" version="1">Text</plugin>

    <plugin author="Scirra" id="Touch" version="1">Touch</plugin>



    <behavior author="Scirra" id="Bullet" version="1">Bullet</behavior>

    <behavior author="Scirra" id="DragnDrop" version="1">Drag &amp; Drop</behavior>

    <behavior author="Scirra" id="Pin" version="1">Pin</behavior>


    I checked the console and got this:


    [Project] Exception opening:

    window.Mx {Ju: "'Sign' does not accept 0 parameters", jg: 'Incorrect parameters', QU: 42, H2: 46, Kc: w…w.rC}

    H2: 46

    Ju: "'Sign' does not accept 0 parameters"

    c: window.rC {Pb: w…w.nG, fe: d, lob: d, Nu: {…}, lEa: 'Ship.X + BoardSize/20*VectorButton.VecX * Sign', …}

    QU: 42

    jg: "Incorrect parameters"

    [[Prototype]]: Object

    is there anyway I can recover the project?

  • Looks like you have a variable named Sign. It's a system expression in C3.

    So you need to rename the variable to something like SignVar in C2, before trying to open the project in C3.

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  • That was it, thank you so much.

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