Oracle & Powershell different behaviour in batch file - windows

Question

I have built a script that connects to an Oracle database and proceed to some various export.
It works perfectly when I launch powershell.exe from Windows start menu and run the script as follows:
.\OracleConnect
But, when I try to automatize the exact same script by launching it from a batch, I'm getting an error message:
"The type initializer for 'Oracle.DataAccess.Client.OracleConnection' threw an exception"
As I said the script is identical in both case.
My .bat file is as follows:
set path=%~dp0
set file=OracleConnect.ps1
C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe -ExecutionPolicy Bypass %file%
I've also tried with the alternative powershell.exe path:
C:\Windows\syswow64\WindowsPowerShell\v1.0\powershell.exe -ExecutionPolicy Bypass %file%
Without any success.
Here is my full script:
$scriptpath = Split-Path -Parent -Path $MyInvocation.MyCommand.Definition
Set-Location $scriptpath
[void][Reflection.Assembly]::LoadFile($scriptpath + "\Oracle.DataAccess.dll")
$logpath = $scriptpath + "\Export.txt"
$connectionpath = read-host 'connection file [optional]'
if($connectionpath)
{
$connectionstring = get-content $connectionpath
}
else
{
$server = read-host 'host name'
$user = read-host 'user name'
$pass = read-host 'password'
$database = read-host 'service'
$connectionstring = "Data Source=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=$server)(PORT=1521)))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=$database)));User Id=$user;Password=$pass;"
}
$echoon = read-host 'echo on (y - n) [default off]'
function global:get-result($query)
{
$oracleconnection = new-object Oracle.DataAccess.Client.OracleConnection
$oracleconnection.connectionstring = $connectionstring
$oracleconnection.Open()
$oraclecommand = $oracleconnection.CreateCommand()
$oraclecommand.CommandText = $query
$reader = $oraclecommand.ExecuteReader()
$writer = new-object System.IO.StreamWriter($logpath)
$counter = 0
write-output ""
while ($reader.Read())
{
$columns = ""
$columnslog = ""
$tab = ""
$tablog = ""
if($counter -eq 0)
{
for ($i= 0; $i -lt $reader.FieldCount; $i++)
{
$columns = $columns + " | " + $reader.GetName($i)
$columnslog = $columnslog + "`t" + $reader.GetName($i).ToUpper()
}
$writer.WriteLine($columnslog)
if($echoon -eq "y")
{
write-output $columns
write-output ""
}
}
for ($i= 0; $i -lt $reader.FieldCount; $i++)
{
$tab = $tab + " | " + $reader.GetValue($i).ToString()
$tablog = $tablog + "`t" + $reader.GetValue($i).ToString()
}
$writer.WriteLine($tablog)
if($echoon -eq "y")
{
write-output $tab
write-output ""
}
$counter = $counter + 1
}
$oracleconnection.Close()
$writer.Close()
}
function global:update-query($query)
{
$oracleconnection = new-object Oracle.DataAccess.Client.OracleConnection
$oracleconnection.connectionstring = $connectionstring
$oracleconnection.Open()
$oraclecommand = $oracleconnection.CreateCommand()
$oraclecommand.CommandText = $query
$reader = $oraclecommand.ExecuteNonQuery()
}
function global:readscript($path)
{
$inenc = [System.Text.Encoding]::UTF7
$reader = new-object System.IO.StreamReader($path, $inenc)
$finalquery = ""
while ($line = $reader.ReadLine())
{
$finalquery += $line
}
$reader.close()
return $finalquery
}
write-output "Enter query or type 'exit' to quit..."
while($true)
{
$value = read-host " "
if($value -eq "exit")
{
$save = read-host "Save connection ? [Y:yes N:no]"
if($save.ToLower() -eq "y")
{
$path = read-host "Connection path"
if(test-path $path)
{
rm $path
}
new-item -type file -force $path
$writer = New-Object System.IO.StreamWriter $path
$writer.WriteLine($connectionstring)
$writer.Close()
}
else
{
}
return
}
else
{
if($value.Tolower().EndsWith(".sql") -eq $false)
{
if ($value.ToLower().StartsWith("select") -or $value.ToLower().StartsWith("show"))
{
get-result($value)
}
else
{
update-query($value)
}
}
else
{
$scriptquery = readscript $value
if ($scriptquery.ToLower().StartsWith("select") -or $scriptquery.ToLower().StartsWith("show"))
{
get-result($scriptquery)
}
else
{
update-query($scriptquery)
}
}
}
}
Edit:
I've now tried to catch the exception adding a try catch instruction here:
try
{
$oracleconnection = new-object Oracle.DataAccess.Client.OracleConnection
}
catch
{
write-host $_.Exception.ToString()
}
And I'm getting this message:
Oracle.DataAccess.Client.OracleException: The provider is not compatible with the version of Oracle client
I still don't understand how this can be an issue with the version of Oracle since it works fine when I run it from a powershell window.