> ## Documentation Index > Fetch the complete documentation index at: https://docs.fairground.fi/llms.txt > Use this file to discover all available pages before exploring further. # Error Selector Reference > Decode on-chain revert reasons from their 4-byte hex. On-chain contract calls can revert with a **4-byte error selector** (error signature). The table below maps each selector to a human-readable message. | Signature | Message | | ------------ | ------------------------------------------------------------------ | | `0x00eb943e` | Margin to extract exceeds PnL | | `0x01735734` | Cannot open opposite side order while position exists | | `0x0313b285` | Market already exists | | `0x0428f2af` | Position must be filled to reduce | | `0x0490d80a` | Invalid max IF fraction | | `0x05baf701` | Margin to reduce exceeds initial margin | | `0x075d545b` | Margin cannot be zero | | `0x09ee12d5` | Not a contract | | `0x0a62b8f3` | No position found | | `0x0a8ed92c` | Denominator is zero | | `0x0ae3681c` | Cannot add selectors to zero address | | `0x0db557d4` | Trade fee overflow | | `0x0dc149f0` | Position already initialized | | `0x0dfa289a` | Invalid side | | `0x0e7186fb` | Oracle data required | | `0x11d7116c` | Fill size exceeds open order position size | | `0x1265b6c8` | Invalid shock factor | | `0x14abe8cd` | Executable queue size cannot be zero | | `0x1602e9e9` | Invalid seizure threshold | | `0x16d402d1` | Only fully filled orders can be added to | | `0x192105d7` | Initialization function reverted | | `0x1d351536` | Stale manual reduce order pointer | | `0x20cada95` | New position size is zero | | `0x21511763` | Batch array lengths must be equal | | `0x21c35dd1` | Reduce order does not belong to position | | `0x23d88bc0` | No pending open order to release | | `0x25153723` | Stop loss order already exists | | `0x25e2f413` | Order must be pending or partially filled to cancel | | `0x2683d346` | Total reduce size exceeds available size | | `0x29d842c0` | Only trader can cancel their order | | `0x2b870c24` | Maximum leverage must exceed minimum leverage | | `0x321794aa` | Not protocol admin | | `0x358d9d1a` | Cannot replace function with the same function from the same facet | | `0x3728b83d` | Invalid amount | | `0x37668688` | Native token not accepted | | `0x376ab111` | Array too large | | `0x3789a26b` | Size is zero | | `0x38be0951` | Notional value overflow | | `0x39060dc5` | Reduce order must be in terminal state | | `0x396476ce` | Invalid stop loss or take profit prices | | `0x3e43f616` | Margin to extract exceeds available margin | | `0x3ee5aeb5` | Reentrancy guard reentrant call | | `0x43898c0a` | Duplicate order ID | | `0x46361ddd` | Scale factor result overflow | | `0x48a4298b` | Not in matching session | | `0x4aeccc1b` | Lambda exceeds one | | `0x4c3cbf04` | Not proposed protocol admin | | `0x4d2acfe8` | Trade size must be multiple of lot size | | `0x4e23d035` | Index out of bounds | | `0x520300da` | Cannot replace immutable function | | `0x52313c09` | Insurance fund allocation overflow | | `0x5274afe7` | SafeERC20 operation failed | | `0x5416eb98` | Function not found | | `0x581a7f65` | Net balance should be negative | | `0x59caa480` | Price threshold cannot be zero | | `0x5c86708f` | Margin operations not allowed on pending position | | `0x5cddff42` | Cannot replace function that does not exist | | `0x5ce28caf` | No position or pending order found for stop loss/take profit | | `0x5d706033` | Invalid order ID | | `0x5dc35903` | Initial margin must be greater than zero | | `0x60f8f321` | Eth not accepted | | `0x6223f681` | Take profit price must be better than mark price | | `0x651a6fee` | Position must be partially or fully filled | | `0x66634bf7` | Facet call returned no data | | `0x69b1189f` | Only fully filled orders can be extracted | | `0x6fafeb08` | Cannot remove immutable function | | `0x71303cf3` | Entitlement percentage exceeds BPS scale | | `0x71ec6e28` | Position in liquidation | | `0x741df939` | Market is paused | | `0x7451ecdf` | Pending orders on opposite side | | `0x76028bdf` | Reduce size exceeds available size | | `0x7a08a22d` | Cannot remove function that does not exist | | `0x7b67157c` | Minimum leverage too low | | `0x7d92e766` | Order book is full | | `0x7e86a579` | Maximum pending reduce orders exceeded | | `0x7fe9a41e` | Incorrect facet cut action | | `0x806c8697` | Lot size cannot be zero | | `0x80e54607` | Market has open positions | | `0x82b42900` | Unauthorized | | `0x84540995` | Facet has no code or has been destroyed | | `0x8568428e` | Reduce size must be greater than zero | | `0x85de96b8` | Invalid oracle price data | | `0x89af5fc3` | Invalid market ID hash | | `0x8d1665da` | Trader liquidation corrupted | | `0x919834b9` | No bytecode at address | | `0x91f63592` | Queue overflow | | `0x93a4b908` | Reduce order size exceeds open order position size | | `0x94280d62` | Invalid ERC20 spender | | `0x96c6fd1e` | Invalid ERC20 sender | | `0x9dba39bc` | Revenue overflow | | `0xa6429e9f` | Notional cannot be zero | | `0xab77128e` | Take profit order already exists | | `0xad6857d1` | Manual reduce order already exists | | `0xad9757f4` | Invalid stop loss price | | `0xaf31444f` | Open interest exists across markets | | `0xb036286e` | Fill size exceeds remaining reduce order size | | `0xb04f990b` | Market scale factor is zero | | `0xb0cfa447` | Market does not exist | | `0xb113638a` | Value does not exist | | `0xb1eecba4` | Matching oracle price mismatch | | `0xb3215542` | Margin extraction would exceed maximum leverage | | `0xb419e811` | Trade size out of allowed range | | `0xb50b6422` | Merged position would be underwater | | `0xb61fbe34` | Position scale factor snapshot is zero | | `0xb6c49a15` | Open interest is zero | | `0xb6f63d65` | Empty name not allowed | | `0xbb33e6ac` | Value already exists | | `0xbe543a82` | Only trader can reduce their order | | `0xbf36e93f` | Market IF fraction too high | | `0xc541a95b` | Open order has zero size, cannot reduce | | `0xc8444e18` | Insurance fund has existing position | | `0xcb64ae8d` | Leverage must be whole number | | `0xcbd5b1d2` | Margin to add must be greater than zero | | `0xcc6595f7` | Invalid ADL threshold | | `0xccd52fbc` | Pointer out of bounds | | `0xcd98a96f` | Cannot replace functions from facet with zero address | | `0xcf4ce7bc` | Invalid take profit price | | `0xd060c572` | Open order must be partially or fully filled | | `0xd091bc81` | Remove facet address must be zero address | | `0xd36d8965` | Order not found | | `0xd8eadcb5` | Only trader can update their order | | `0xd92e233d` | Zero address not allowed | | `0xda177f42` | Leverage exceeds max allowed | | `0xda5f1a6a` | Leverage out of allowed range | | `0xe1140add` | Filled size overflow | | `0xe450d38c` | Insufficient ERC20 balance | | `0xe570110f` | SafeERC20 failed to decrease allowance | | `0xe602df05` | Invalid ERC20 approver | | `0xe672ee91` | Fill size must be greater than zero | | `0xe6e66ac8` | Order must be pending to update | | `0xe73ffde8` | Position must be decreased | | `0xe767f91f` | No selectors provided for facet for cut | | `0xe7d507dc` | Invalid max size | | `0xeb4f513d` | Shock percentage is too high | | `0xeb6ba048` | No selectors given to add | | `0xebb8ab27` | Position must be increased | | `0xebbf5d07` | Cannot add function to diamond that already exists | | `0xec442f05` | Invalid ERC20 receiver | | `0xed0cfdf0` | Stop loss price must be worse than mark price | | `0xed732d0c` | Tree is full | | `0xefac47f8` | Market name cannot be updated | | `0xf4d678b8` | Insufficient balance | | `0xf4dcf37e` | Invalid maintenance margin ratio | | `0xf5c787f1` | Price overflow | | `0xf9b42874` | Price oracle not set | | `0xfab43128` | Liquidation order not in queue | | `0xfb3ab2be` | Opposite side open interest is zero | | `0xfb57fb37` | Margin addition would overflow | | `0xfb8f41b2` | Insufficient ERC20 allowance | | `0xff4127cb` | Not contract owner |