`standard cost` was stamped as 0 during selling so the GL transaction was not created for the COGS account of the item sold.

[zybersup]

It happens sometimes, not all the times. Although it does not fail the stock counting, it fails the stock valuation a lot because the COGS transactions are not created in table gl_trans.

table stock_moves has data like this.

table debtor_tran_details has data like this