The following list is an exhaustive tabulation of all the error codes Doors CS may throw. The majority only occur when executing BASIC programs and are analogous to the TI-OS ERR:…… errors.

# Error 501: The program you are trying to run is not supported by Doors CS [Error: Invalid Type] (TYP)
# Error 502: A library this program needs to function is unavailable [Error: Missing Library] (LIB)
# Error 503: The specified file could not be found [Error: File Not Found] (FNF)
# Error 504: Insufficient memory to archive or unarchive [Error: Memory] (MEM)
# Error 505: No programs present (TI=83 only) [Error: No progs] (NPG)
# Error 506: The file Doors CS has attempted to archive or unarchive contains errors, or there is insufficient memory [Error: Archive] (MEM)

# Error 507: Overflow Error [ERR: OVERFLOW] (OVR)
# Error 508: Divide by Zero Error [ERR: DIVBY0] (DV0)
# Error 509: Singular Matrix Error (SNG)
# Error 510: Domain Error [ERR: DOMAIN] (DOM)
# Error 511: Increment Error (INC)
# Error 512: Break [ERR: BREAK] (BRK)
# Error 513: Nonreal Error [ERR: NONREAL] (NRL)
# Error 514: Syntax Error [ERR: SYNTAX] (SYN)
# Error 515: Datatype Error [ERR: DATATYPE] (TYP)
# Error 516: Argument Error [ERR: ARGUMENT] (ARG)
# Error 517: Dim Mismatch [ERR: MISMATCH] (MSM)
# Error 518: Dimension Error [ERR: DIM] (DIM)
# Error 519: Undefined Error [ERR: UNDEFINED] (UND)
# Error 520: Memory Error [ERR: MEMORY] (MEM)
# Error 521: Invalid Error [ERR: INVALID] (INV)
# Error 522: Illegal Nest [ERR: ILLEGAL NEST] (ILN)
# Error 523: Bound Error [ERR: BOUNDS] (BND)
# Error 524: Graph Range [ERR: RANGE] (RNG)
# Error 525: Invalid Zoom [ERR: ZOOM] (ZOM)
# Error 526: Specified label does not exist [ERR: LABEL] (LBL)
# Error 527: Statistics calculation error [ERR: STATS] (STS)
# Error 528: Solver has generated errors [ERR: SOLVER] (SLV)
# Error 529: Singularity reached [ERR: SINGULARITY] (SNG)
# Error 530: No sign change [ERR: NO SIGN CHANGE] (SCH)
# Error 531: Too many iterations [ERR: ITERATIONS] (ITR)
# Error 532: Guess not within low & high bounds [ERR: BAD GUESS] (BDG)
# Error 533: Stats plot error [ERR: STAT PLOT] (STP)
# Error 534: Tol was too small [ERR: TOLNOTMET] (TNM)
# Error 535: Reserved variable [ERR: RESERVED] (RSR)
# Error 536: Device in wrong mode [ERR: MODE] (MDE)

# Error 537: Link connection error [ERR: LINK] (LNK)
# Error 538: Insufficient memory to receive [ERR: MEMORY] (MEM)
# Error 539: Transmission error [ERR: XMIT] (XMT)
# Error 540: A duplicate variable exists [ERR: DUPLICATE] (DUP)
# Error 541: Insufficient memory to receive [ERR: MEMORY] (MEM)
# Error 542: Unknown variable type [ERR: TYPE] (TYP)

# Error 543: Scale incorrect [ERR: SCALE]
# Error 544: ID not found [ERR: ID NOT FOUND]
# Error 545: No mode
# Error 546: App could not be validated [ERR: VALIDATION]
# Error 547: Length
# Error 548: Application error
# Error 549: Application error 2
# Error 550: Specified app has expired
# Error 551: Bad address
# Error 552: The referenced variable is archived and cannot be accessed [ERR: ARCHIVED]
# Error 553: Variable intended for a different version [ERR: VERSION]
# Error 554: Archive is full [ERR: ARC FULL]
# Error 555: Variable
# Error 556: A variable with the same name exists [ERR: DUPLICATE]