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********************* IBIS GOLDEN PARSER BUG REPORT FORM *********************
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INSTRUCTIONS

To report a bug in the IBIS golden parser.  Please fill out the top part
of the following form and send the complete form to info@ibis.org.

A list of reported bugs is maintained at http://ibis.org/bugs/ibischk/ .

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PARSER VERSION NUMBER: 6.1.4 and all since 4.2.0.

PLATFORM (SPARC, HP700, PC, etc.): PC

OS AND VERSION: Windows 10 tested

REPORTED BY: Michael Schaeder, Zuken; Mike LaBonte, SiSoft

DATE: December 5, 2017

DESCRIPTION OF BUG:
E0544 is Correct, but Message has TBD Text

(This has been a long standing issue that has existed in the QA suite.)

The test case is a simplified form of the test in 

  qa_windows/qa/ver4_1/errors/bird77.2/compat77_2.ibs

These test cases generate a correct error:

IBISCHK6 V6.1.4

Checking bug194.ibs for IBIS 4.2 Compatibility...

E0544 - TBD: Put this in model check, *_DIFF without external model
E0544 - TBD: Put this in model check, *_DIFF without external model

Errors  : 2

File Failed

---

The first part of the message, "TBD: Put this in model check"
should be deleted.

The rule that is checked is that [External Model] is required
under [Model] for true differential operation, as indicated by
any of these Model_type choices: Input_diff, I/O_diff, 3-state_diff,
or Output_diff.

The suggested fixes:

1. If possible, change the message to

"[Model] %s has Model_type %s (true differential) and requires missing
[External Model]"

This may require moving the check from cmpnt.c to another file where
Model_type and [External Model] are processed/checked.  However, that
also may require a new Error number and a reclassification of E0554 to
Unused.

2. Otherwise, just create a simpler message without model_name and
Model_type references:

"[Model] with Model_type *_diff is true differential and requires
[External Model]"


====

INSERT IBIS FILE DEMONSTRATING THE BUG:

[IBIS Ver]     4.1
[File Name]    bug194.ibs
[File Rev]     1.0
[Date]         December 5, 2017
[Source]       Derived from JNP QA Test Case
|
[Notes]       Check *_diff syntax by Jon Powell for QA only
              This test case is simpplified from

              qa_windows/qa/ver4_1/errors/bird77.2/compat77_2.ibs
|
[Component]       BUG194
[Manufacturer]    JNP
|
[Package]
|Variable     Typ               Min             Max
R_pkg         0                 0.0            0.0
L_pkg         0.0               0.0            0.0
C_pkg         0.0               0.0            0.0

[Pin] signal_name       model_name
1     Test1p            INPUT
2     Test1n            INPUT
|
[Diff Pin] inv_pin vdiff tdelay_typ tdelay_min tdelay_max
1            2     200mV    0ns        0ns        0ns
|
[Model]         INPUT
|
Model_type      Input_diff
|
C_comp    0.0   0.0  0.0
|
[Voltage Range]           3.2          3.2     3.2 
[Gnd Clamp Reference]     0            0       0
|
[End]


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******************** BELOW FOR ADMINISTRATION AND TRACKING *******************
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BUG NUMBER:                                                  194

SEVERITY: [FATAL, SEVERE, MODERATE, ANNOYING, ENHANCEMENT]   ANNOYING

PRIORITY: [HIGH, MEDIUM, LOW]                                LOW

STATUS: [OPEN, CLOSED, WILL NOT FIX, NOT A BUG]             CLOSED

FIXED VERSION:  6.1.5

FIXED DATE:    December 21, 2018 

NOTES ON BUG FIX:
Classified at the December 15, 2017 IBIS Open Forum.

Error E0544 text changed to drop TBD and clarify that Input_diff requires
[External Model]

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