Some errors using sh instead of bash

Hello everybody,

I upgraded from Ubuntu 12.04 to 16.04, so some of my scripts in bash does NOT work, for example:

Code:

#!/bin/bash

# Some other codes

for ((offset=$thumbStart; offset<=$thumbEnd; offset+=10))
        do
        printf -v outfile "$filePNG"_"%03d.png" "$((++n))"

Output:

Code:

# sh runScript.sh 
smartCode.sh: 459: functions.sh: Syntax error: Bad for loop variable

I tried with another example, it returns the same error

Code:

#!/bin/bash

for (( i=0; i<=10; i+=2 ))
do
 echo "Welcome $i times" 
done

Using bash:

Code:

# bash test.sh 
Welcome 0 times
Welcome 2 times
Welcome 4 times
Welcome 6 times
Welcome 8 times
Welcome 10 times

But in some other scripts I've got some more errors using bash, how can I swap back using:

Code:

sh test.sh

Some info:

Code:

# lsb_release -a
No LSB modules are available.
Distributor ID:    Ubuntu
Description:    Ubuntu 16.04.1 LTS
Release:    16.04
Codename:    xenial

======


# type bash
bash is /bin/bash

-========


# bash -version
GNU bash, version 4.3.46(1)-release (x86_64-pc-linux-gnu)
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://ift.tt/KpOJT7;


This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Thanks in advance

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Some errors using sh instead of bash