# Error upon Connection in Toad

**URL:** <https://forums.toadworld.com/t/error-upon-connection-in-toad/39087>\
**Category:** Toad for Oracle & DevOps Toolkit\
**Created:** [February 16, 2017, 11:36am UTC](https://forums.toadworld.com/t/error-upon-connection-in-toad/39087 "2017-02-16T11:36:38Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![j.meneghello](https://avatars.discourse-cdn.com/v4/letter/j/7993a0/32.png) [@j.meneghello](https://forums.toadworld.com/u/j.meneghello)\
**Post date:** [February 16, 2017, 11:36am UTC](https://forums.toadworld.com/t/error-upon-connection-in-toad/39087/1 "2017-02-16T11:36:38Z")

</div>

Yesterday I was trying to use Toad to login to one of our Oracle databases, when my computer crashed. Once I restarted my computer, whenever I try to login to any database, it gives me an “Invalid stream format” error. Here’s the stack trace which the error log gave:

EurekaLog 7.0.3.0

## Application:

1.1 Start Date : Thu, 16 Feb 2017 13:04:43 +0500  
1.2 Name/Description: Toad.exe - (Toad for Oracle)  
1.3 Version Number : 11.6.1.6  
1.6 Up Time : 1 minute(s), 22 second(s)

## Exception:

2.2 Address : 00477574  
2.3 Module Name: Toad.exe - (Toad for Oracle)  
2.5 Type : EReadError  
2.6 Message : Invalid stream format.  
2.7 ID : 2DD20000  
2.11 Sent : 0

## User:

3.2 Name : Nationwide  
3.3 Email:

## Computer:

5.2 Total Memory : 8466423808  
5.3 Free Memory : 4302639104  
5.4 Total Disk : 126953189376  
5.5 Free Disk : 50766688256  
5.6 System Up Time: 3 hour(s), 38 minute(s), 42 second(s)  
5.7 Processor : Intel® Core™ i5-2520M CPU @ 2.50GHz

## Operating System:

6.1 Type : Microsoft Windows 7 (64 bit)  
6.2 Build #: 7601

## Steps to reproduce:

8.1 Text:

## Call Stack Information:

## |Methods |Details|Stack |Address |Module |Offset |Unit |Class |Procedure/Method |Line |

|\*Exception Thread: ID=8548; Parent=0; Priority=-2 |  
|Class=; Name=MAIN |  
|DeadLock=0; Wait Chain= |

| Comment= |
| --- |
| 7FFFFFFE |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |
| 00000040 |

* * *

## Modules Information:

## |Handle |Name |Description |Version |Size |Modified |Path |

|00400000|Toad.exe |Toad for Oracle |11.6.1.6 |40634232|2012-11-19 16:50:54|C:\Program Files (x86)\Quest Software\Toad for Oracle 11.6\ |  
|14DF0000|oci.dll |Oracle Call Interface |11.2.0.1 |987136 |2010-04-02 06:42:34|C:\OracleWin32\11g\11.2.0.1.0\Client\bin\ |  
|14F70000|oranl11.dll |Oracle SQL_Net ORANL DLL |11.2.0.1 |397312 |2010-03-31 06:56:04|C:\OracleWin32\11g\11.2.0.1.0\Client\bin\ |  
|15030000|orantcp11.dll |Oracle SQL_Net ORANTCP DLL |11.2.0.1 |217088 |2010-03-31 06:56:10|C:\OracleWin32\11g\11.2.0.1.0\Client\bin\ |  
|15070000|oranldap11.dll |Oracle SQL_Net ORANLDAP DLL |11.2.0.1 |311296 |2010-03-31 06:56:46|C:\OracleWin32\11g\11.2.0.1.0\Client\bin\ |  
|150D0000|orancrypt11.dll |Oracle SQL_Net ORANCRYPT DLL |11.2.0.1 |118784 |2010-03-31 06:56:32|C:\OracleWin32\11g\11.2.0.1.0\Client\bin\ |  
|15110000|oranro11.dll |Oracle SQL\*Net ORANRO DLL |11.2.0.1 |307200 |2010-03-31 06:56:00|C:\OracleWin32\11g\11.2.0.1.0\Client\bin\ &nb

---

<div class="post-metadata">

**Author:** ![JohnDorlon](https://sea1.discourse-cdn.com/quest/user_avatar/forums.toadworld.com/johndorlon/32/9997_2.png) [@JohnDorlon](https://forums.toadworld.com/u/JohnDorlon)\
**Post date:** [February 16, 2017, 11:47am UTC](https://forums.toadworld.com/t/error-upon-connection-in-toad/39087/2 "2017-02-16T11:47:43Z")

</div>

Looks like it bombed while trying to load the threaded queries window in the Editor. You might try deleting the grid settings for that window - go to your user files folder, then GUISettings under that, and delete any files that match the pattern: _SEThreadedQueries_.\*

If that doesn’t solve it, you could try renaming your GUISettings folder (Toad will create a new one). All you’ll lose settings wise is grid customizations.

If that doesn’t solve it, renaming your User Files folder should solve it. That will lose all settings in Toad.