uploading a Page Layout to MasterPage Gallery

[sfarq]

Loving the tool a lot.
However I have an issue. I am trying to use this method to upload some new publishing page layouts, with correct meta data. it all works great until i try to set the PublishingAssociatedContentType property. It fails with "Unable to update metadata of the file".

I believe that the problem is the PublishingAssociatedContentType field name. However, this is the correct internal field name for updating it in CSOM. So i have also tried different values / different combinations of values (including valid CSOM values) to no avail... (see below for the different ones i tried)

Any thoughts?
Thanks Simon

Here is the gulpfile.js (note when i take OUT the PublishingAssociatedContentType it all works but does not set the necessasy associated content type field value...)

Removed top part of GULPFILE.JS
` "verbose": true,
"update_metadata": true,
"files_metadata": fileMetadata
})).
pipe(gulp.dest('build'));
});

var fileMetadata = [
{
name: 'SimonsPL.aspx',
metadata: {
"__metadata": { type: "SP.Data.OData__x005f_catalogs_x002f_masterpageItem" },
Title: 'Simons Page Layout',
MasterPageDescription: 'This is a page layout for me',
ContentTypeId: '0x01010007FF3E057FA8AB4AA42FCB67B453FFC100E214EEE741181F4E9F7ACC43278EE811',
PublishingAssociatedContentType: "0x010100C568DB52D9D0A14D9B2FDCC96666E9F2007948130EC3DB064584E219954237AF390064 }
}
];

//PublishingAssociatedContentType: ';#Welcome Page;#0x010100C568DB52D9D0A14D9B2FDCC96666E9F2007948130EC3DB064584E219954237AF390064DEA0F50FC8C147B0B6EA0636C4A7D4;#',
DEA0F50FC8C147B0B6EA0636C4A7D4"

// PublishingAssociatedContentType: ';#Welcome Page;0x010100c568db52d9d0a14d9b2fdcc96666e9f2007948130ec3db064584e219954237af390064dea0f50fc8c147b0b6ea0636c4a7d4;#'`

[madenorth]

Hi @sfarq

Did you manage to get this working?