# Index of exceptions

A
Abort [Unixqueue] | Event handlers can raise this exception to cancel a group of handlers, events, and resources.
Addressing_method_not_supported [Uq_engines] | Raised by `client_socket_connector` and `server_socket_acceptor` to indicate that the passed address is not supported by the class.
Already_installed [Shell_sys] | Raised when the job handlers are already installed
B
Bad_glob_expr [Netglob] | An syntax error in the glob expression; the argument is the bad expression
Bad_header_field [Nethttp] | Raised when a header field cannot be parsed.
Bad_message [Http_client] | The server sent a message which cannot be interpreted.
Bad_state [Netpop] |
Break [Netshm] |
Broken_communication [Uq_engines] | Some engines indicate this error when they cannot continue because the other endpoint of communication signals an error.
Buffer_underrun [Netchannels] | Raised by input methods if the internal buffer of the channel is too empty to read even one byte of data.
Byte_order_mark [Netconversion] | Raised when it is tried to get the code point of the BOM at the beginning of the string
C
Cancelled [Uq_engines] | The callback function of a `multiplex_controller` is invoked with this exception if the operation is cancelled.
Cannot_represent [Rtypes] | raised if a conversion can't be done (same as `Netnumber.Cannot_represent`)
Cannot_represent [Netnumber] | raised if a conversion can't be done
Cannot_represent [Netconversion] | Raised when a certain Unicode code point cannot be represented in the selected output encoding
Client_is_down [Rpc_client] | The RPC call cannot be performed because the client has been shut down in the meantime.
Closed_channel [Netchannels] | Raised when channel operations are called when the channel is closed
Closed_channel [Uq_engines] | Raised when a method of a closed channel object is called (only channel methods count).
Cluster_service_unavailable [Rpc_proxy.ManagedSet] | Raised by `mset_pick` when no available endpoint can be found, or all available endpoints have reached their maximum load.
Command_failure [Netchannels] | Raised by `close_in` or `close_out` if the channel is connected with another process, and the execution of that process fails.
Communication_error [Rpc_client] | an I/O error happened
Config_error [Netplex_config] |
Connection_lost [Rpc_server] | raised by the 'reply' function if the connection to the original caller has been lost in the meantime.
Container_variable_not_found [Netplex_cenv] | The variable does not exist
Container_variable_type_mismatch [Netplex_cenv] | The (dynamically typed) variable has the wrong type
Corrupt_file [Netshm] | Raised when a violation of the object format is detected
Cursor_out_of_range [Netconversion] | Raised when it is tried to move the cursor beyond the beginning of the string or beyond the end of the string.
D
Deadlock [Netshm] | Raised when a deadlock situation was detected.
Dest_failure [Xdr] | raised if the dest_* function are applied to non-matching xdr_value
E
Empty [Netmcore_queue] | Raised when the queue is empty and the operation cannot be done
Empty [Netcamlbox] |
End_of_string [Netconversion] | Raised when it is tried to access the character after the end of the string (at position `n_max`)
Err_status [Netpop] |
Error [Rpc_transport] | Passed back as ``Error`.
Error [Netulex.Ulexing] | Lexical error
Executable_not_found [Shell_sys] | Raised when an executable file cannot be found; the argument is the search name
Extensions_not_supported [Netmech_scram] | Raised by clients when the server enables an unsupported extension.
F
FTP_error [Ftp_client] | Something went wrong, often on socket level
FTP_method_perm_failure [Ftp_client] |
FTP_method_temp_failure [Ftp_client] |
FTP_method_unexpected_reply [Ftp_client] | These exceptions may be raised during execution by the FTP method.
FTP_protocol_violation [Ftp_client] | The server violates the FTP specification
FTP_timeout [Ftp_client] | A timeout on the control or data connection (this is a fatal error)
Fatal_error [Shell_sys] | An error is fatal if it is not possible to recover from it in a predictable manner.
H
HTTP [Netcgi_common] | Exception raised by various functions of this library to return to the user agent an appropriate error page with the specified http-status (this exception must be caught by the connector and a default answer sent).
Host_not_found [Uq_resolver] | This host cannot be resolved
Http_error [Http_client] | Deprecated.
Http_protocol [Http_client] | The request could not be processed because the exception condition was raised.
I
Immutable [Netmime] | Raised if it is tried to modify a read-only value.
Integrity_error [Netmech_scram.Cryptosystem] |
Invalid_encoding [Netmech_scram] | Raised by clients when something cannot be decoded.
Invalid_server_signature [Netmech_scram] | Raised by clients when the signature sent by the server is invalid (i.e.
Invalid_username_encoding [Netmech_scram] | Raised by clients when the username does not match the requirements.
K
Keep_call [Rpc_client] | This exception can be raised by the callback function that is invoked when the server response arrives.
Key_service_problem [Rpc_key_service] | All exceptions (except the exceptions defined above) are wrapped into `Key_service_problem`.
L
Late_drop [Rpc_server] | This can be raised in encryption/decryption functions to prevent that a response is sent.
Line_too_long [Mimestring] | Raised when the hard limit of the line length is exceeded
Line_too_long [Uq_io] | May be raised by `Uq_io.input_line_e`
M
Malformed_URL [Neturl] | Raised by a number of functions when encountering a badly formed URL.
Malformed_code [Netconversion] | Raised when an illegal byte sequence is found
Malformed_code_at [Netconversion] | An illegal byte sequence is found at this byte position
Mem_not_supported [Uq_engines] | May be raised by multiplex controller methods `start_mem_reading` and `start_mem_writing` if these methods are not supported for the kind of file descriptor
Message_lost [Rpc_client] | got EOF when some pending procedure calls were not replied or even sent
Message_timeout [Rpc_client] | After all retransmissions, there was still no reply
Message_too_big [Netcamlbox] |
N
Name_resolution_error [Http_client] | Could not resolve this name - same as `Uq_engines.Host_not_found`
Netname_unknown [Rpc_key_service] | The netname is invalid
Next [Netshm] |
No_Unix_process_group [Shell_sys] | Raised by functions referring to Unix process groups when the job has not been started in its own process group.
No_reply [Http_client] | There was no response to the request because some other request failed earlier and it was not allowed to send the request again.
No_resource [Netmcore] | No such resource, or no resource of the expected type
No_secret_key [Rpc_key_service] | The user does not have a secret key for the netname
Not_implemented [Netcgi1_compat] | Raised by some functions/exceptions when a feature of the old model cannot be implemented in the new model or vice versa
Not_in_container_thread [Netplex_cenv] | Raised when the caller's thread is not a container thread
O
Out_of_handlers [Equeue] | Raised by `run` when the event source adds new events to the queue but there are no event handlers to process them
Out_of_pool_memory [Netmcore_mempool] |
Out_of_range [Rtypes] | raised if string position out of range (same as `Netnumber.Out_of_range`)
Out_of_range [Netnumber] | raised if string position out of range
Out_of_space [Netsys_mem] |
Oversized [Netcgi.Argument] |
Oversized [Netcgi_common] | See `Netcgi.Argument.Oversized`.
P
Parse_error [Netaddress] | A parsing error.
Partial_character [Netconversion] | Raised when the last character of the string is an incomplete multi-byte character, and it is tried to get the code point (using `uchar_at`).
Permanent_error [Netsmtp] |
Protocol_error [Netsmtp] |
Protocol_error [Netpop] |
Protocol_error [Netmech_scram] | Raised by clients when the server violates the protocol.
Proxy_error [Http_client] | An error status from a proxy.
R
Recv_queue_empty [Nethttpd_kernel] |
Redirect_request [Nethttpd_types] | The "early" redirect is only allowed in stage 1 of HTTP processing.
Redirect_response [Nethttpd_types] | The "late" redirect is only allowed in stage 3 of HTTP processing.
Reject [Equeue] | May be raised by event handlers to reject events
Response_dropped [Rpc_client] | Drop reason: The response exceeded the configured maximum message size
Response_too_large [Http_client] | The length of the response exceeds the configured maximum
Rpc_cannot_unpack [Rpc] | RPC protocol error (bad data)
Rpc_server [Rpc] | an exception generated by the RPC server
S
Send_queue_empty [Nethttpd_kernel] |
Server_error [Netmech_scram] | Raised by clients when the server sent an error code
Service_unavailable [Rpc_proxy.ManagedClient] | Procedure calls may end with this exception when the reliability cache disables the service
Sharedvar_no_permission [Netplex_sharedvar] | It is not allowed to set the value
Sharedvar_not_found [Netplex_sharedvar] | The variable does not exist.
Sharedvar_null [Netplex_sharedvar] | The initial value of a shared exception variable
Sharedvar_type_mismatch [Netplex_sharedvar] | The (dynamically typed) variable has the wrong type (string/exn)
Shutdown_not_supported [Netsys] | See `gshutdown`
Socks_error [Uq_socks5] | Raised when error messages of the SOCKS proxy are received, or because of other SOCKS-related problems.
Ssl_error [Uq_ssl] | Used in `when_done` callbacks to indicate an SSL-specific error code
Standard_response [Nethttpd_types] | Some HTTP containers allow you to raise this exception.
Subprocess_error [Shell] | The string contains the called commands in a readable representation.
T
Telnet_protocol [Telnet_client] | Wrapper for exceptions that already passed the exception handler.
Terminate [Equeue] | May be raised by event handlers to accept events while terminating themselves
Time_not_available [Rpc_time] |
Timeout [Http_client] | A timeout.
Timeout [Uq_engines] | Used by `input_engine` and `output_engine` to indicate timeouts
Too_many_descriptors [Netsys_pollset_win32] |
Too_many_redirections [Http_client] | While following redirections the limit has been reached
Transient_error [Netsmtp] |
Type_mismatch [Netplex_encap] | Raised when an encapulated type is tried to be unwrapped by the wrong encapsulation module
U
URL_syntax_error [Http_client] | This URL cannot be parsed after a redirection has been followed.
Unbound_exception [Rpc_client] | This exception can be raised by the callback function that is invoked when the server response arrives.
Unsupported_expr [Netglob] | The notations `:class:`, `.symbol.`, `=eqclass=` inside `...` are not supported by this implementation.
W
Watchdog_timeout [Uq_engines] | Used by the watchdog engine to indicate a timeout.
X
Xdr_failure [Xdr] | Usually a problem during packing
Xdr_format [Xdr] | Format error found during unpacking a string
Xdr_format_message_too_long [Xdr] | The message is too long and cannot be packed into a string