# Error: invalid BigNumber string

**URL:** <https://forum.openzeppelin.com/t/error-invalid-bignumber-string/16434>\
**Category:** Contracts\
**Created:** [October 2, 2021, 5:49pm UTC](https://forum.openzeppelin.com/t/error-invalid-bignumber-string/16434 "2021-10-02T17:49:00Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Maham\_Zaidi](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.openzeppelin.com/maham_zaidi/32/5143_2.png) [@Maham\_Zaidi](https://forum.openzeppelin.com/u/Maham_Zaidi)\
**Post date:** [October 2, 2021, 5:49pm UTC](https://forum.openzeppelin.com/t/error-invalid-bignumber-string/16434/1 "2021-10-02T17:49:00Z")

</div>

I want to input the following values to this function

```auto
function rebase(uint256 epoch, int256 supplyDelta)

```

- epoch (5 minutes later)
- supplyDelta -0.000000000000001

I tried doing so in remix but got an error. How to resolve this issue?

> errored: Error encoding arguments: Error: invalid BigNumber string (argument="value", value="-0.000000000000001", code=INVALID\_ARGUMENT, version=bignumber/5.4.1)

---

<div class="post-metadata">

**Author:** ![Amxx](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.openzeppelin.com/amxx/32/668_2.png) [@Amxx](https://forum.openzeppelin.com/u/Amxx)\
**Post date:** [October 4, 2021, 7:51am UTC](https://forum.openzeppelin.com/t/error-invalid-bignumber-string/16434/2 "2021-10-04T07:51:34Z")

</div>

Hello @Maham_Zaidi

> [@Maham\_Zaidi](#):
>
> -0.000000000000001

This is not a valid integer. It looks like you are trying to pass a floating number. Floating number do not (natively) exist in solidity / on the evm.