AE error: This property has no maximum value

Report · Aug 30, 2017

I am iterating through comp layers and layer properties and saving them in an object. I then call JSON.stringify() on the object created put in JSON valid format. Unfortunately I am getting an error:

Unable to execute script at line 230. After effects error: This property has no maximum value.

This is the function and line that the debugger points to. This is just a small piece of code.

function storeAVLayerData(avLayer){

var layer = new Object();

var layerTypeData = determineLayerType(avLayer);

alert("layername: "+avLayer.name);

layer.name = avLayer.name;

layer.type = layerTypeData.type;

layer.index = avLayer.index;

layer.height = avLayer.height;

layer.width = avLayer.width;

layer.motionBlur = avLayer.motionBlur;

layer.effectsActive = avLayer.effectsActive;

layer.adjustmentLayer = avLayer.adjustmentLayer;

layer.guideLayer = avLayer.guideLayer;

layer.threeDLayer = avLayer.threeDLayer;

layer.threeDPerChar = avLayer.threeDPerChar;

layer.environmentLayer = avLayer.environmentLayer;

layer.canSetCollapseTransformation = avLayer.canSetCollapseTransformation;

layer.collapseTransformation = avLayer.collapseTransformation;

layer.frameBlending = avLayer.frameBlending;

layer.frameBlendingType = avLayer.frameBlendingType;

layer.canSetTimeRemapEnabled = avLayer.canSetTimeRemapEnabled;

layer.timeRemapEnabled = avLayer.timeRemapEnabled;

layer.autoOrient = avLayer.autoOrient;

layer.hasTrackMatte = avLayer.hasTrackMatte;

layer.trackMatteType = avLayer.trackMatteType;

layer.isTrackMatte = avLayer.isTrackMatte;

layer.preserveTransparency = avLayer.preserveTransparency;

layer.quality = avLayer.quality;

layer.preserveTransparency = avLayer.preserveTransparency;

layer.parent = avLayer.parent;

layer.startTime = avLayer.startTime;

layer.stretch = avLayer.stretch;

layer.inPoint = avLayer.inPoint;

layer.outPoint = avLayer.outPoint;

layer.enabled = avLayer.enabled;

layer.solo = avLayer.solo;

layer.shy = avLayer.shy;

layer.locked = avLayer.locked;

return layer; //this is line 230

}

If I don't call the JSON.stringify() on an object, then the error is never thrown. This seems like an error in structure of object. This code works for a lot of projects, but some issue an error. How can I debug this and what does the error actually mean? It is kinda vague and google seems to be clueless.

Report · Aug 30, 2017

You get this kind off error when you query prop.maxValue while the property 'prop' does not have a max value

Examples:

theLayer.transform.postion.maxValue; // error

theLayer.transform.opacity.maxValue; // 100

so that querying maxValue should be preceeded by: if (prop.hasMax) (prop.maxValue etc...).

Therefore it is strange that your function generates this error, because layers dont have the maxValue attribute, only properties do.

Xavier.

Report · Aug 30, 2017

Thanks for stopping by. Nowhere in my code I query for maxValue of anything. Strange indeed.

Report · Aug 30, 2017

Actually some long time ago I tried writing objectToSource() function that would parse AE properties. I remember I was getting those maxValue errors as well. Since this function wasn't that essential, I simply skipped maxValue. But guess what? Then AE complained about minValue. After ignoring minValue it complained about lightType, separationDimension, separationLeader

Anyways, if you want to take a look, there it is - AE Script: AE Object to Source — Bitbucket

That snippet would produce such result for a layer:

{

"active": true,

"audioEnabled": true,

"autoOrient": 4212,

"blendingMode": 5212,

"canSetCollapseTransformation": true,

"canSetEnabled": true,

"containingComp": {

"bgColor": [0.84705882352941, 0.25098039215686, 0.25098039215686],

"duration": 1,

"dynamicLinkGUID": "00000001-0000-0000-0000-000000000000",

"frameDuration": 0.04,

"frameRate": 25,

"hasVideo": true,

"height": 500,

"id": 1,

"label": 3,

"layers": {},

"markerProperty": {

"active": true,

"canVaryOverTime": true,

"enabled": true,

"matchName": "ADBE Marker",

"name": "Marker",

"parentProperty": {

"active": true,

"audioEnabled": true,

"autoOrient": 4212,

"blendingMode": 5212,

"canSetEnabled": true,

"collapseTransformation": true,

"containingComp": {},

"effectsActive": true,

"enabled": true,

"frameBlendingType": 4012,

"hasVideo": true,

"height": 500,

"index": -2147483647,

"isModified": true,

"isNameSet": true,

"label": 10,

"matchName": "ADBE Vector Layer",

"name": "Markers",

"numProperties": 9,

"outPoint": 29,

"propertyType": 6213,

"quality": 4614,

"samplingQuality": 4812,

"selectedProperties": [],

"stretch": 100,

"trackMatteType": 5012,

"width": 500

},

"propertyDepth": 1,

"propertyIndex": 1,

"propertyType": 6212,

"propertyValueType": 6420,

"selectedKeys": [],

"value": {

"eventCuePoint": true

}

},

"motionBlurAdaptiveSampleLimit": 128,

"motionBlurSamplesPerFrame": 16,

"name": "Comp 1",

"numLayers": 1,

"parentFolder": {

"dynamicLinkGUID": "00000000-0000-0000-0000-000000000000",

"items": {},

"name": "Root",

"numItems": 2,

"typeName": "Folder"

},

"pixelAspect": 1,

"renderer": "ADBE Advanced 3d",

"renderers": ["ADBE Advanced 3d", "ADBE Ernst", "ADBE Picasso", "ADBE Standard 3d"],

"resolutionFactor": [1, 1],

"selected": true,

"selectedLayers": [({})],

"selectedProperties": [],

"shutterAngle": 180,

"shutterPhase": -90,

"typeName": "Composition",

"usedIn": [],

"width": 500,

"workAreaDuration": 1

},

"effectsActive": true,

"enabled": true,

"frameBlendingType": 4012,

"hasVideo": true,

"height": 500,

"index": 1,

"isModified": true,

"isNameFromSource": true,

"label": 1,

"matchName": "ADBE AV Layer",

"name": "Red Solid 1",

"numProperties": 11,

"outPoint": 1,

"propertyType": 6213,

"quality": 4614,

"samplingQuality": 4812,

"selected": true,

"selectedProperties": [],

"source": {

"dynamicLinkGUID": "00000090-0000-0000-0000-000000000000",

"frameDuration": 1,

"hasVideo": true,

"height": 500,

"id": 144,

"label": 1,

"mainSource": {

"alphaMode": 5412,

"color": [0.77772700786591, 0.18244600296021, 0.33126199245453],

"fieldSeparationType": 5613,

"isStill": true,

"loop": 1,

"premulColor": [0, 0, 0],

"removePulldown": 5813

},

"name": "Red Solid 1",

"parentFolder": {

"dynamicLinkGUID": "0000008f-0000-0000-0000-000000000000",

"id": 143,

"items": {},

"name": "Solids",

"numItems": 1,

"parentFolder": {

"dynamicLinkGUID": "00000000-0000-0000-0000-000000000000",

"items": {},

"name": "Root",

"numItems": 2,

"typeName": "Folder"

},

"typeName": "Folder"

},

"pixelAspect": 1,

"typeName": "Footage",

"usedIn": [({})],

"width": 500

},

"stretch": 100,

"trackMatteType": 5012,

"width": 500

}

Report · Aug 30, 2017

haha, looks like ae has a brain of its own. I am actually writing the same thing. I guess i will be adding new properties and waiting for code to break.

Report · Aug 30, 2017

Are you using some includes ? Because it is very unlikely that the function you posted at the top of this thread is causing the issue.

Report · Aug 30, 2017

It actually does, just not at line 230. I am assigning a layer.parent with avLayer.parent. I've come across project with actual parent set. In that case layer.parent gets a AE object (another AVLayer) assigned. You can't JSON.stringify AE objects. That was the reason for this error. It had nothing to do with maxValue. AE scripting needs a book with this gotchas. I may write it in the future