Transforming Customer to Vendor through SS2

Hello NetSuite gurus,

we need to be able to transform customer to vendor (on the UI this is the Other Relationship Function) through SuiteScript 2.0 API.

When we try this through a suitelet - we can do it and the operation is successful.

When we try this through a scheduled script - the script returns an error message {"type":"error.SuiteScriptError","name":"RCRD_DSNT_EXIST","message":"That record does not exist."}

Here is the sample code that we use on both the scheduled script  and on the suitelet:

var vendor = record.transform({

fromType: record.Type.CUSTOMER,

fromId: 138,

toType: record.Type.VENDOR,