error helios-min.js:69 Uncaught (in promise) Error: non-positive token amounts detected

[besiwims]

I have come across this error many times and my students too have raised in their Helios testing and apps.

Here is the trace details

error helios-min.js:69 Uncaught (in promise) Error: non-positive token amounts detected
at assert (helios-min.js:69:442)
at Assets.assertAllPositive (helios-min.js:69:89962)
at Value.assertAllPositive (helios-min.js:69:93008)
at TxBody.addOutput (helios-min.js:421:124026)
at Tx.balanceAssets (helios-min.js:421:112139)
at Tx.finalize (helios-min.js:421:116977)
at txEnd (coxylib.js:714:14)
at async nbid (auction.html:272:21)
at async window.onclick (auction.html:482:22)

this means there is not FT/NFT which is being locked

[besiwims]

Here is the possible solution:

Assets.assertAllPositive is a function of Assets class in Helios which checks each asset(FT/NFT) that it is not less than 1 before you transfer it from your wallet in a transaction.

It makes sense because you cannot transfer or sale something you do not have.

How to fix this.

Check your output Value(s) that the included assets are in your inputs i.e. in your wallet.